| Ba Island | Raja Ampat | 0.00 km² | — | — |
| Baabaa Nus Island | Kaimana | 0.00 km² | — | — |
| Bababa Island | Fakfak | 0.01 km² | — | — |
| Babani Pumpesun Island | Raja Ampat | 0.01 km² | — | — |
| Babar Island | Babar Islands | 622.7 km² | — | 833 m |
| Babase Island | New Ireland Province | 23 km² | — | 200 m |
| Babel Island | Tasmania | 440 km² | — | 68 m |
| Babi Atas Island | Aru Islands Regency | 0.00 km² | — | — |
| Babi Bawah Island | Aru Islands Regency | 0.00 km² | — | — |
| Babi Besar Island | Aru Islands Regency | 0.85 km² | — | 1 m |
| Babi Island | Aru Islands Regency | 5.49 km² | — | 11 m |
| Bablomekang | Koror | — | — | 80 m |
| Babo Island | Teluk Bintuni | 20.9 km² | — | — |
| Babuan Island | Tanimbar Islands | 3.36 km² | — | 10 m |
| Baburnu Island | Kaimana | 0.00 km² | — | — |
| Back Island | New South Wales | — | — | 1 m |
| Badau Barat Island | Fakfak | 0.00 km² | — | — |
| Badau Timur Island | Fakfak | 0.00 km² | — | — |
| Badawar Island | Aru Islands Regency | 0.29 km² | — | — |
| Baddow Island | Queensland | — | — | 13 m |
| Badefa Island | Fakfak | 0.01 km² | — | — |
| Badger Island | Tasmania | 1,242 km² | 0 | 14 m |
| Badilni Island | Aru Islands Regency | 0.02 km² | — | — |
| Badu Island | Queensland | 97.8 km² | 818 | 37 m |
| Baffle Group | Queensland | — | — | 7 m |
| Bag Island | Aru Islands Regency | 0.00 km² | — | — |
| Bagabag | Madang Province | 37 km² | 3,000 | — |
| Bagaman Island | Milne Bay Province | 7.45 km² | — | 220 m |
| Bagan Island | Fakfak | 0.00 km² | — | — |
| Bagong Island | Aru Islands Regency | 0.07 km² | — | — |
| Bailechesengel | Palau | — | — | 25 m |
| Bailey Islet | Queensland | — | — | 6 m |
| Bain Island | Aru Islands Regency | 0.10 km² | — | — |
| Bainanan Island | Fakfak | 0.01 km² | — | — |
| Bair Island | Tual | 1.50 km² | — | 28 m |
| Baiwawa Island | Yapen Islands | 0.08 km² | — | 1 m |
| Bakbak Island | Fakfak | 0.11 km² | — | 33 m |
| Baker Island | Victoria | — | — | 13 m |
| Bakers Island | New South Wales | — | — | 6 m |
| Balaclava Island | Queensland | — | — | 3 m |
| Balak Island | Raja Ampat | 0.00 km² | — | — |
| Balbal Les Island | Raja Ampat | 0.01 km² | — | — |
| Balbal Lol Island | Raja Ampat | 0.00 km² | — | — |
| Balbileget Sawi Island | Raja Ampat | 0.00 km² | — | — |
| Balbileget Sawi Island | Raja Ampat | 0.00 km² | — | — |
| Balbili Island | Raja Ampat | 0.55 km² | — | 16 m |
| Balbili Lol Island | Raja Ampat | 0.05 km² | — | — |
| Balbili Mirinle Island | Raja Ampat | 0.09 km² | — | — |
| Balbilleget Yeffo Island | Raja Ampat | 0.00 km² | — | — |
| Balbul Atsa Island | Raja Ampat | 0.00 km² | — | — |
| Balbul Fat Island | Raja Ampat | 0.02 km² | — | — |
| Balbul Ganan Island | Raja Ampat | 0.01 km² | — | — |
| Balbul Lim Island | Raja Ampat | 0.00 km² | — | — |
| Balbul Lu Island | Raja Ampat | 0.00 km² | — | — |
| Balbul Pale Island | Raja Ampat | 0.13 km² | — | — |
| Balbul Tol Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Kapatcol Masos Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Kapatcol Togaya Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Kapatcol Yasancau Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapacol Katem Tobantano Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapacol Nitiptobalbulya Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapacol Toluya Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tabofon Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Toforon Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tolanam Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tolentau Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tomanyanimtotiplol Island | Raja Ampat | 0.00 km² | — | — |
| Balbulol Nikapatcol Tomasigitlapo Island | Raja Ampat | 0.00 km² | — | — |
| Bald Island | Queensland | — | — | 5 m |
| Baldy Island | New South Wales | — | — | 6 m |
| Balea Fat Island | Raja Ampat | 0.01 km² | — | — |
| Balea Island | Raja Ampat | 0.00 km² | — | — |
| Balea Island | Raja Ampat | 0.00 km² | — | — |
| Balea Lu Island | Raja Ampat | 0.00 km² | — | — |
| Balea Tol Island | Raja Ampat | 0.00 km² | — | — |
| Balesewolo Island | Sorong | 0.02 km² | — | — |
| Ball Island | South Australia | — | — | 15 m |
| Ball's Pyramid | New South Wales | 0.20 km² | 0 | 572 m |
| Ballahoo Island | Tasmania | — | — | 2 m |
| Baluan Island | Manus Province | 17 km² | 300 | — |
| Bam | East Sepik Province | 3.80 km² | 1,154 | 686 m |
| Bam Island | Eastern Seram | 1.46 km² | 0 | 37 m |
| Bam Island | Raja Ampat | 0.03 km² | — | — |
| Bama Island | Aru Islands Regency | 0.00 km² | — | — |
| Bamborough Island | Queensland | — | — | 14 m |
| Bambu Island | Aru Islands Regency | 0.36 km² | — | 11 m |
| Bambu Island | Sorong | 0.19 km² | — | — |
| Bambukuning Island | Aru Islands Regency | 0.04 km² | — | — |
| Banaba Island | Gilbert Islands | 6 km² | 333 | 81 m |
| Banana Island | Queensland | — | — | 16 m |
| Banda Island | Northern Territory | — | — | 5 m |
| Bandicoot Island | New South Wales | — | — | 1 m |
| Bangus Island | New South Wales | — | — | 214 m |
| Banks Island | Queensland | — | — | 22 m |
| Banlu Ganan Island | Raja Ampat | 0.01 km² | — | — |
| Banos Nikapatcol Island | Raja Ampat | 0.00 km² | — | — |
| Banuwain Island | Fakfak | 0.48 km² | — | — |
| Banyaganan Yef Kanitif Island | Raja Ampat | 0.00 km² | — | — |
| Banyaganan Yefto Sapen Island | Raja Ampat | 0.00 km² | — | — |
| Banyagananpulau Island | Raja Ampat | 0.02 km² | — | — |
| Banyan Island | Northern Territory | — | — | 18 m |
| Bara Island | Aru Islands Regency | 0.00 km² | — | — |
| Barabinusa Natuk Island | Fakfak | 0.00 km² | — | — |
| Barabinusa Nenem Island | Fakfak | 0.01 km² | — | — |
| Barahun Island | Autonomous Region of Bougainville | 38 km² | — | — |
| Barakan Island | Aru Islands Regency | 38.0 km² | — | 27 m |
| Baras Island | Fakfak | 0.01 km² | — | — |
| Bare Sand Island | Northern Territory | — | — | 3 m |
| Bare Sand Peak | South Australia | — | — | 7 m |
| Bareena Island | New South Wales | — | — | 69 m |
| Bari Island | Aru Islands Regency | 2.04 km² | — | — |
| Barimnusapuan Island | Fakfak | 0.01 km² | — | — |
| Barlings Island | New South Wales | — | — | 1 m |
| Barmah Island | Victoria | — | — | 107 m |
| Barn Island | Queensland | — | — | 10 m |
| Barney Island | Queensland | — | — | 11 m |
| Baronusu Island | Kaimana | 0.25 km² | — | — |
| Barrel Rock | Tasmania | — | — | 9 m |
| Barren Island | Queensland | — | — | 19 m |
| Barren Island | Queensland | — | — | 129 m |
| Barron Island | Northern Territory | 450 km² | — | 21 m |
| Barton Island | Victoria | — | — | 2 m |
| Barubbra Island | Queensland | — | — | 6 m |
| Barunguba Montague Island Nature Reserve | New South Wales | 0.87 km² | — | 19 m |
| Bascombe Island | South Australia | — | — | 6 m |
| Basilaki Island | Milne Bay Province | 106 km² | — | 531 m |
| Basion Island | Teluk Wondama | 0.00 km² | — | — |
| Bass Island | New South Wales | — | — | 13 m |
| Bass Pyramid | Tasmania | 100 km² | — | — |
| Bass Reef | Northern Territory | — | — | 1 m |
| Baswaru Island | Eastern Seram | 0.02 km² | — | — |
| Bat Island | Northern Territory | — | — | 8 m |
| Bat Mame Yef Binamoe Island | Raja Ampat | 0.00 km² | — | — |
| Bat Mame Yef Yahya Island | Raja Ampat | 0.00 km² | — | — |
| Bat Ndruak Island | Tanimbar Islands | 0.00 km² | — | — |
| Bataam Island | New South Wales | — | — | 10 m |
| Batang Pele Island | Raja Ampat | 13.6 km² | — | 175 m |
| Batanta Island | Raja Ampat | 453 km² | — | 1,184 m |
| Batarkusu Island | Tanimbar Islands | 0.00 km² | — | — |
| Batbitiem Ganan Island | Raja Ampat | 0.02 km² | — | — |
| Batbitiem Pale Island | Raja Ampat | 0.64 km² | — | 48 m |
| Batbitiem Palolon Island | Raja Ampat | 0.03 km² | — | — |
| Batbitiem Pat Island | Raja Ampat | 0.00 km² | — | — |
| Batbitiem Sawi Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Abdul Rauf Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Kacu Tol Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Koin Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Lanampale Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Males Island | Raja Ampat | 0.00 km² | — | — |
| Batbitim Yef Tolili Island | Raja Ampat | 0.00 km² | — | — |
| Batbual Island | Tanimbar Islands | 0.00 km² | — | — |
| Batcor Da Island | Tanimbar Islands | 0.00 km² | — | — |
| Batcor Dol Island | Tanimbar Islands | 0.00 km² | — | — |
| Batcor Mbuir Island | Tanimbar Islands | 0.00 km² | — | — |
| Batewar Island | Teluk Wondama | 0.00 km² | — | — |
| Bathurst Island | Northern Territory | 2,600 km² | 1,640 | 29 m |
| Batibag Island | Aru Islands Regency | 0.28 km² | — | — |
| Batiflang Atakanak Island | Tanimbar Islands | 0.00 km² | — | — |
| Batiki | Lomaiviti | 12 km² | 300 | — |
| Batimee Island | Raja Ampat | 4.58 km² | — | 1 m |
| Batimee Ket Island | Raja Ampat | 0.02 km² | — | — |
| Batimee Lil Island | Raja Ampat | 0.03 km² | — | — |
| Batimere Genan Island | Raja Ampat | 0.75 km² | — | — |
| Batkawat Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkendyapar Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkendyapar Selatan Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkendyapar Tengah Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkies Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkunda Island | Tanimbar Islands | 0.00 km² | — | — |
| Batkwai Island | Tanimbar Islands | 0.00 km² | — | — |
| Batlayery Island | Tanimbar Islands | 0.00 km² | — | — |
| Batlios Island | Tanimbar Islands | 0.00 km² | — | — |
| Batmame Atsa Island | Raja Ampat | 0.01 km² | — | — |
| Batmame Fat Island | Raja Ampat | 0.00 km² | — | — |
| Batmame Fit Island | Raja Ampat | 0.00 km² | — | — |
| Batmame Island | Raja Ampat | 0.06 km² | — | — |
| Batmame Lim Island | Raja Ampat | 0.01 km² | — | — |
| Batmame Lu Island | Raja Ampat | 0.02 km² | — | — |
| Batmame Tol Island | Raja Ampat | 0.00 km² | — | — |
| Batmame Wal Island | Raja Ampat | 0.01 km² | — | — |
| Batmame Wonom Island | Raja Ampat | 0.00 km² | — | — |
| Batmeket Island | Raja Ampat | 0.01 km² | — | — |
| Batngevual Island | Tanimbar Islands | 0.00 km² | — | — |
| Batnjuak Island | Tanimbar Islands | 0.00 km² | — | — |
| Batsepin Island | Tanimbar Islands | 0.00 km² | — | — |
| Batsire Island | Tanimbar Islands | 0.00 km² | — | — |
| Batsulety Island | Tanimbar Islands | 0.00 km² | — | — |
| Battery Island | Tasmania | 6,800 km² | — | — |
| Battiflang Island | Tanimbar Islands | 0.00 km² | — | — |
| Battormyar Barat Island | Tanimbar Islands | 0.00 km² | — | — |
| Battormyar Island | Tanimbar Islands | 0.01 km² | — | — |
| Battormyar Timur Island | Tanimbar Islands | 0.00 km² | — | — |
| Battormyar Utara Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Anuf Barat Island | Fakfak | 0.00 km² | — | — |
| Batu Anuf Timur Island | Fakfak | 0.00 km² | — | — |
| Batu Arobi Island | Kaimana | 0.00 km² | — | — |
| Batu Bagan Island | Fakfak | 0.00 km² | — | — |
| Batu Belabuh Island | Fakfak | 0.00 km² | — | — |
| Batu Bendera Island | Aru Islands Regency | 17.5 km² | — | — |
| Batu Besar Island | Fakfak | 0.00 km² | — | — |
| Batu Bukarung Barat Island | West Papua | 0.00 km² | — | — |
| Batu Bukarung Selatan Island | West Papua | 0.00 km² | — | — |
| Batu Bukarung Utara Island | West Papua | 0.00 km² | — | — |
| Batu Bulomin Island | Eastern Seram | 0.00 km² | — | — |
| Batu Daraknusa Island | Fakfak | 0.01 km² | — | — |
| Batu Empe Island | Sorong | 0.00 km² | — | — |
| Batu Fotfodan Island | Fakfak | 0.00 km² | — | — |
| Batu Furier Selatan Island | Fakfak | 0.00 km² | — | — |
| Batu Furier Tengah Island | Fakfak | 0.00 km² | — | — |
| Batu Furier Utara Island | Fakfak | 0.00 km² | — | — |
| Batu Gantung Island | Fakfak | 0.00 km² | — | — |
| Batu Goyang Island | Aru Islands Regency | 0.00 km² | — | — |
| Batu Ibuar Island | Fakfak | 0.00 km² | — | — |
| Batu Indang Island | Central Maluku | 0.00 km² | — | — |
| Batu Kainuni Island | Fakfak | 0.00 km² | — | — |
| Batu Kapal Besar Island | Eastern Seram | 0.00 km² | — | — |
| Batu Kapal Island | Central Maluku | 0.00 km² | — | — |
| Batu Kapal Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Kapal Kecil Island | Eastern Seram | 0.00 km² | — | — |
| Batu Kapal Serar Island | Aru Islands Regency | 0.02 km² | — | — |
| Batu Karam Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Karosi Besar Island | West Papua | 0.00 km² | — | — |
| Batu Karosi Kecil Island | West Papua | 0.00 km² | — | — |
| Batu Kelapa Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Keraf Island | Fakfak | 0.00 km² | — | — |
| Batu Kitikiti Selatan Island | Fakfak | 0.00 km² | — | — |
| Batu Labuan Besar Island | West Papua | 0.01 km² | — | — |
| Batu Labuan Kecil Island | West Papua | 0.00 km² | — | — |
| Batu Labuankarosi Besar Island | West Papua | 0.00 km² | — | — |
| Batu Labuankarosi Kecil Island | West Papua | 0.00 km² | — | — |
| Batu Lau Island | Eastern Seram | 0.00 km² | — | — |
| Batu Layar Island | Fakfak | 0.00 km² | — | — |
| Batu Lupa Selatan Island | Fakfak | 0.00 km² | — | — |
| Batu Lupa Utara Island | Fakfak | 0.00 km² | — | — |
| Batu Malaka Barat Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Malaka Tengah Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Meja Island | Aru Islands Regency | 0.01 km² | — | — |
| Batu Merah Besar Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Merah Kecil Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Monmon Island | Fakfak | 0.00 km² | — | — |
| Batu Munggamuer Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Naga Island | Aru Islands Regency | 0.00 km² | — | — |
| Batu Nukaifui Island | Yapen Islands | 0.00 km² | — | — |
| Batu Otak Island | Eastern Seram | 0.00 km² | — | — |
| Batu Pajabat Island | Fakfak | 0.00 km² | — | — |
| Batu Patimongmongga Island | Fakfak | 0.00 km² | — | — |
| Batu Pendeta Island | Yapen Islands | 0.00 km² | — | — |
| Batu Puar Island | Fakfak | 0.00 km² | — | — |
| Batu Rei Island | Eastern Seram | 0.01 km² | — | — |
| Batu Sabaro Island | Fakfak | 0.01 km² | — | — |
| Batu Sabaro Natuk Island | Fakfak | 0.00 km² | — | — |
| Batu Sabaro Selatan Island | Fakfak | 0.01 km² | — | — |
| Batu Sambomber Barat Island | Fakfak | 0.00 km² | — | — |
| Batu Sambomber Timur Island | Fakfak | 0.00 km² | — | — |
| Batu Sasoi Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Seram Island | Tanimbar Islands | — | — | 1 m |
| Batu Sibuak Island | Fakfak | 0.00 km² | — | — |
| Batu Talikbibi Dua Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Talikbibi Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Talikbibi Satu Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tamoni Barat Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Tamoni Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Tamoni Timur Island | Teluk Wondama | 0.00 km² | — | — |
| Batu Tawar Barat Island | Fakfak | 0.00 km² | — | — |
| Batu Tawar Timur Island | Fakfak | 0.00 km² | — | — |
| Batu Tiga Darat Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tiga Laut Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tiga Selatan Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tiga Timur Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tiga Utara Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Tiga Utara Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Timbul Island | Fakfak | 0.00 km² | — | — |
| Batu Tipoaret Island | Fakfak | 0.00 km² | — | — |
| Batu Tufir Island | Fakfak | 0.00 km² | — | — |
| Batu Waitin Island | Fakfak | 0.00 km² | — | — |
| Batu Wampe Island | Tanimbar Islands | 0.00 km² | — | — |
| Batu Yewen Island | Raja Ampat | 0.00 km² | — | — |
| Batu Yop Island | Teluk Wondama | 0.00 km² | — | — |
| Batubandera | Maluku | — | — | 21 m |
| Batuhun Island | Sorong | 0.03 km² | — | — |
| Batulai Island | Aru Islands Regency | 1.28 km² | — | 7 m |
| Bau | Tailevu | 0.08 km² | — | — |
| Baudin Rocks | South Australia | — | — | 12 m |
| Baun Island | Aru Islands Regency | 108.0 km² | — | 30 m |
| Bauza Island | Southland District | 4.80 km² | 0 | 383 m |
| Bawe Beba Island | Biak Numfor | 0.03 km² | — | — |
| Bawe Kasun Island | Biak Numfor | 0.00 km² | — | — |
| Bawei Island | Yapen Islands | 0.39 km² | — | — |
| Baxters Island | Victoria | — | — | 123 m |
| Bay Island | Queensland | — | — | 12 m |
| Bayampop Atsa Island | Raja Ampat | 0.19 km² | — | — |
| Bayampop Fat Island | Raja Ampat | 0.00 km² | — | — |
| Bayampop Island | Raja Ampat | 0.96 km² | — | — |
| Bayampop Lu Island | Raja Ampat | 0.01 km² | — | — |
| Bayampop Tol Island | Raja Ampat | 0.02 km² | — | — |
| Bayampop Yefto Lapaleo Island | Raja Ampat | 0.00 km² | — | — |
| Bayampop Yefto Rapat Lolya Island | Raja Ampat | 0.01 km² | — | — |
| Bayasyanan Island | Fakfak | 0.00 km² | — | — |
| Bayeda Island | Kaimana | 0.02 km² | — | — |
| Bayley Island | Queensland | 254.0 km² | — | 4 m |
| Bayley Rock | Tasmania | — | — | 36 m |
| Baynham Island | Queensland | — | — | 10 m |
| Bazeley Island | Victoria | — | — | 132 m |
| Beahgoo Island | Queensland | 20.4 km² | — | 2 m |
| Beanley Island | Queensland | 0.07 km² | — | 9 m |
| Bear Islet | New South Wales | — | — | 1 m |
| Beatrice Island | Roper Gulf Region | — | — | 8 m |
| Beatrice Islet Conservation Park | South Australia | 1.03 km² | — | — |
| Beavers Island | New South Wales | — | — | 182 m |
| Beda Island | Aru Islands Regency | 0.43 km² | — | — |
| Bedarra Island | Queensland | — | — | 101 m |
| Bedewen Oser Island | Biak Numfor | 0.00 km² | — | — |
| Beehive Island | Queensland | — | — | 38 m |
| Beer-Eetar Island | Northern Territory | — | — | 11 m |
| Beesley Island | Queensland | — | — | 6 m |
| Befondi Island | Supiori | 2.22 km² | — | 7 m |
| Befor Island | Raja Ampat | 0.03 km² | — | — |
| Beiyef Ganan Island | Raja Ampat | 0.12 km² | — | — |
| Beiyefarem Les Island | Raja Ampat | 0.01 km² | — | — |
| Beiyefarem Lool Island | Raja Ampat | 0.01 km² | — | — |
| Beiyefarem Pat Island | Raja Ampat | 0.01 km² | — | — |
| Beiyefarem Sawi Island | Raja Ampat | 0.01 km² | — | — |
| Beket Katem Island | Raja Ampat | 0.00 km² | — | — |
| Beket Lu Island | Raja Ampat | 0.00 km² | — | — |
| Belal Atsa Island | Raja Ampat | 0.01 km² | — | — |
| Belal Fat Island | Raja Ampat | 0.00 km² | — | — |
| Belal Island | Raja Ampat | 0.01 km² | — | — |
| Belal Lu Island | Raja Ampat | 0.00 km² | — | — |
| Belal Tol Island | Raja Ampat | 0.00 km² | — | — |
| Belbagenan Ganan Island | Raja Ampat | 0.00 km² | — | — |
| Belbagenan Palay Island | Raja Ampat | 0.00 km² | — | — |
| Belle Vue Island | Southland Region | — | — | 189 m |
| Belles Le Island | Raja Ampat | 0.21 km² | — | 9 m |
| Belles Lol Island | Raja Ampat | 0.24 km² | — | 12 m |
| Bellevue Island | Tasmania | — | — | 598 m |
| Bellions Rock | Tasmania | — | — | 5 m |
| Bells Island | New South Wales | — | — | 1 m |
| Belsar Island | Victoria | — | — | 61 m |
| Bemlo Island | Raja Ampat | 0.09 km² | — | — |
| Ben Balls Island | Tasmania | — | — | 262 m |
| Benben Island | Aru Islands Regency | 0.65 km² | — | — |
| Bench Island | Southland Region | — | 0 | 63 m |
| Bengori Island | Aru Islands Regency | 0.00 km² | — | 12 m |
| Bennison Island | Victoria | 0.08 km² | 0 | 17 m |
| Benteng Keramat Lu Island | Raja Ampat | 0.00 km² | — | — |
| Bentinck Island | Queensland | 13,873 km² | — | — |
| Beqa | Central Division | 36 km² | 4,000 | 462 m |
| Berageree Island | New South Wales | — | — | 1 m |
| Berdefan Island | Aru Islands Regency | 0.68 km² | — | — |
| Beresfords Island | New South Wales | — | — | 67 m |
| Berry Island | New South Wales | — | — | 53 m |
| Bertrams Island | Tasmania | — | — | 1,015 m |
| Beru | Gilbert Islands | 17.6 km² | 2,909 | — |
| Berwick Island | Queensland | — | — | 7 m |
| Besifer Oser Island | Biak Numfor | 0.00 km² | — | — |
| Bessie Island | Queensland | 12.2 km² | — | 5 m |
| Bet Islet | Queensland | 0.18 km² | 0 | 11 m |
| Betio | Tarawa | 1.54 km² | 18,565 | — |
| Betlapo Island | Raja Ampat | 0.01 km² | — | — |
| Betsey Island | Tasmania | — | — | 98 m |
| Beturfarfar Island | Fakfak | 0.00 km² | — | — |
| Bevak Island | Aru Islands Regency | 0.00 km² | — | — |
| Bevans Island | New South Wales | — | — | 1 m |
| Beveridge Island | New South Wales | — | — | 66 m |
| Bewick Island | Queensland | 1.30 km² | — | 8 m |
| Biak Island | Biak Numfor | 10,896 km² | — | 127 m |
| Biawak Dua Island | Kaimana | 0.00 km² | — | — |
| Biawak Satu Island | Kaimana | 0.00 km² | — | — |
| Biawak Tiga Island | Kaimana | 0.00 km² | — | — |
| Bicker Isles | South Australia | — | — | 5 m |
| Bicker Isles | South Australia | — | — | 5 m |
| Bickerton Island | Northern Territory | 215 km² | 135 | 21 m |
| Bidadari Island | Mimika | 0.72 km² | — | — |
| Bidaugaria Island | Aru Islands Regency | 0.00 km² | — | — |
| Big Casey Island | Victoria | — | — | 176 m |
| Big Green Island | Tasmania | 122 km² | — | 21 m |
| Big Island | New South Wales | — | — | 1 m |
| Big Island | New South Wales | — | — | 813 m |
| Big Island | New South Wales | — | — | 1 m |
| Big Island | New South Wales | — | — | 58 m |
| Big Island | New South Wales | — | — | 5 m |
| Big Island | Southland District | — | — | 59 m |
| Big Patterson Island | Queensland | — | — | 7 m |
| Big Rock | Southland Region | — | — | 27 m |
| Big Woody Island | Queensland | 6.60 km² | — | — |
| Bijori Island | Aru Islands Regency | 0.06 km² | — | — |
| Bikar Atoll | Bikar Atoll | 0.50 km² | — | 6 m |
| Bikini Atoll | Marshall Islands | 6 km² | 9 | 25 m |
| Bikini Islets | South Australia | — | — | 2 m |
| Bilatan Island | Raja Ampat | 0.20 km² | — | — |
| Bilbolkue Island | Aru Islands Regency | 1.14 km² | — | — |
| Billong-Olo-Lah | New South Wales | — | — | 1 m |
| Billongobah | New South Wales | — | — | 1 m |
| Billygoat Island | Tasmania | — | — | 124 m |
| Biloela | New South Wales | — | — | 1 m |
| Bimble Island | New South Wales | — | — | 170 m |
| Binar Island | Asmat | 0.20 km² | — | — |
| Binatfot Atas Island | Aru Islands Regency | 0.00 km² | — | — |
| Binatfot Bawah Island | Aru Islands Regency | 0.00 km² | — | — |
| Binatfot Tengah Island | Aru Islands Regency | 0.00 km² | — | — |
| Bindera Island | New South Wales | — | — | 178 m |
| Bintunis Island | Fakfak | 0.00 km² | — | — |
| Birch Island | Clutha District | — | — | 49 m |
| Bird Island | New South Wales | — | — | 1 m |
| Bird Island | New South Wales | — | — | 1 m |
| Bird Island | Queensland | — | — | 8 m |
| Bird Island | South Australia | — | — | 2 m |
| Bird Island | South Australia | — | — | 6 m |
| Bird Island | Tasmania | — | — | 4 m |
| Bird Island | Circular Head | — | — | 8 m |
| Bird Island Nature Reserve | New South Wales | 0.05 km² | — | 27 m |
| Bird Rock | Tasmania | 1 km² | 0 | — |
| Biri Island | Supiori | 0.01 km² | — | — |
| Birie Island | Raja Ampat | 5.41 km² | — | 159 m |
| Birnie Island | Phoenix Islands | 0.72 km² | 0 | — |
| Bisi Hubuk Island | Sorong | 0.00 km² | — | — |
| Bitair Island | Fakfak | 0.03 km² | — | — |
| Bitalolpa Island | Raja Ampat | 0.00 km² | — | — |
| Bitch And Pups | Victoria | — | — | 75 m |
| Bitem Island | Aru Islands Regency | 0.01 km² | — | — |
| Bitiore Island | Fakfak | 0.01 km² | — | — |
| Bitmey Island | Raja Ampat | 0.01 km² | — | — |
| Bivak Island | Papua | — | — | 24 m |
| Black Currant Island | Queensland | — | — | 22 m |
| Black Fella Island | Northern Territory | — | — | 3 m |
| Black Island | South Australia | — | — | 4 m |
| Black Islet | Northern Territory | — | — | 17 m |
| Black Jacks Island | Canterbury Region | — | — | 362 m |
| Black Pyramid Rock | Circular Head | 0.14 km² | — | — |
| Black Swan Island | Queensland | — | — | 15 m |
| Black Swan Island | Tasmania | — | — | 1 m |
| Blackcombe Island | Queensland | — | — | 6 m |
| Blacks Island | New South Wales | — | — | 2 m |
| Blacksmith Island | Queensland | — | — | 122 m |
| Blackwood Island | Queensland | 1.60 km² | — | 107 m |
| Blefuscu Island | South Australia | — | — | 2 m |
| Blowfly Island | Tasmania | — | — | 802 m |
| Bluff Island | South Australia | — | — | 14 m |
| Bluff Island | Queensland | — | — | 72 m |
| Blumine Island / Ōruawairua | Marlborough District | 4 km² | — | — |
| Blup Blup | East Sepik Province | 3.50 km² | 513 | 402 m |
| Blyth Island | South Australia | — | — | 11 m |
| Bo Island | Raja Ampat | 0.09 km² | — | 27 m |
| Bo Yef Gamuru Island | Raja Ampat | 0.00 km² | — | — |
| Bo Yef Kaculu Island | Raja Ampat | 0.00 km² | — | — |
| Boang Island | New Ireland Province | 27 km² | — | — |
| Boat Creek Island | South Australia | — | — | 22 m |
| Bobo Eina Island | Milne Bay Province | 2.43 km² | — | 245 m |
| Bobs Island | Victoria | — | — | 2 m |
| Bobs Rocks | Tasmania | — | — | 1 m |
| Bobyor Island | Supiori | 0.03 km² | — | — |
| Boconnoc Island | New South Wales | — | — | 1,183 m |
| Bodo Island | Sorong | 0.01 km² | — | — |
| Bodo Mgun Island | Raja Ampat | 0.13 km² | — | — |
| Boi Island | Aru Islands Regency | 0.25 km² | — | — |
| Boigu Island | Queensland | 72.3 km² | 271 | 4 m |
| Boiler Rocks | Tasmania | — | — | 1 m |
| Boinupi Island | Yapen Islands | 0.01 km² | — | — |
| Boinur Island | Aru Islands Regency | 0.03 km² | — | — |
| Boiran Gwau Island | Aru Islands Regency | 0.00 km² | — | — |
| Boiran Island | Aru Islands Regency | 0.07 km² | — | — |
| Boisa | Madang Province | 1.29 km² | 461 | — |
| Bokak Atoll | Marshall Islands | 81.3 km² | — | 3 m |
| Bokakotu Island | Yapen Islands | 0.02 km² | — | — |
| Bokissa | Sanma | — | — | 19 m |
| Bolke Genan Island | Raja Ampat | 0.03 km² | — | — |
| Bolke Pele Island | Raja Ampat | 0.06 km² | — | — |
| Bolorobo Island | New South Wales | — | — | 6 m |
| Boltwood Island | New South Wales | — | — | 2 m |
| Bolun Island | Tanimbar Islands | 2.43 km² | — | 17 m |
| Bomaki Tubun Island | Tanimbar Islands | 0.00 km² | — | — |
| Bombedar Island | Raja Ampat | 0.08 km² | — | 7 m |
| Bon Island | Nabire | 0.09 km² | — | — |
| Bonarua Hili Hili | Milne Bay Province | 0.05 km² | — | 14 m |
| Bond Island | Queensland | — | — | 22 m |
| Bone Island | Fakfak | 0.01 km² | — | 11 m |
| Boni Island | Raja Ampat | 2.09 km² | — | 13 m |
| Bonsfori Island | Supiori | 0.01 km² | — | — |
| Bontedi Island | Aru Islands Regency | 0.00 km² | — | — |
| Boo Genan Island | Raja Ampat | 0.00 km² | — | — |
| Boo Pale Island | Raja Ampat | 0.22 km² | — | — |
| Boo Pololon Island | Raja Ampat | 0.02 km² | — | — |
| Booby Island | Queensland | 0.06 km² | 0 | 21 m |
| Boogee Boogee Island | New South Wales | — | — | 11 m |
| Boojiragi Island | Northern Territory | — | — | 6 m |
| Bookar Island | Queensland | — | — | 1 m |
| Bool Island | South Australia | — | — | 48 m |
| Boomerang Island | New South Wales | — | — | 1 m |
| Boondaba Island | New South Wales | — | — | 1 m |
| Booroowang | New South Wales | — | — | 319 m |
| Boorowhangary Island | New South Wales | — | — | 7 m |
| Boot Rock | Tasmania | — | — | 55 m |
| Bootie Island | Queensland | 0.02 km² | — | 18 m |
| Boraf Island | Fakfak | 0.02 km² | — | — |
| Border Island | Queensland | — | — | 123 m |
| Borontoroif Island | Yapen Islands | 0.00 km² | — | — |
| Bosaktawana Island | Fakfak | 0.00 km² | — | — |
| Bosanquet Island | East Arnhem Region | — | — | 38 m |
| Boston Island | South Australia | — | — | 45 m |
| Bota Island | Tanimbar Islands | 0.01 km² | — | — |
| Bota Selatan Island | Tanimbar Islands | 0.00 km² | — | — |
| Botana Reef | Autonomous Region of Bougainville | — | — | 73 m |
| Botre Island | Nabire | 0.00 km² | — | — |
| Botre Kecil Island | Nabire | 0.00 km² | — | — |
| Bottle Rock | Marlborough District | — | — | 156 m |
| Bottom Rocks | Tasmania | — | — | 1 m |
| Boucaut Island | South Australia | — | — | 10 m |
| Bougainville Island | Autonomous Region of Bougainville | 9,318 km² | 234,280 | 2,715 m |
| Boughtons Island | New South Wales | — | — | 228 m |
| Boukar Island | New South Wales | — | — | 133 m |
| Boundary Islet | Victoria | 2 km² | — | — |
| Bourke Island | Queensland | 0.12 km² | 0 | 3 m |
| Bournda Island | New South Wales | — | — | 38 m |
| Bowden Island | Queensland | — | — | 49 m |
| Bowikamberei Island | Teluk Wondama | 0.03 km² | — | — |
| Boxen Island | Tasmania | 7 km² | — | — |
| Boxwell Island | New South Wales | — | — | 273 m |
| Boy and Dinghy | Tasmania | — | — | 34 m |
| Boyd Island | Tasmania | — | — | 323 m |
| Boydong Island | Queensland | — | — | 12 m |
| Boyds Island | New South Wales | — | — | 65 m |
| Bracken Island | New South Wales | — | — | 1,154 m |
| Bradshaw Island | Queensland | — | — | 5 m |
| Bramagai Island | Raja Ampat | 0.02 km² | — | — |
| Bramble Cay | Queensland | 0.04 km² | 0 | 8 m |
| Brampton Island | Queensland | — | — | 152 m |
| Branyan Island | Queensland | — | — | 8 m |
| Bras Island | Supiori | 1.55 km² | — | — |
| Bray Islet | Queensland | — | — | 10 m |
| Brazendale Island | Tasmania | — | — | 951 m |
| Break O'Day Island | Tasmania | — | — | 233 m |
| Breaksea Island | Southland District | 1.56 km² | — | 350 m |
| Bregwal Island | Aru Islands Regency | 0.00 km² | — | — |
| Bremer Island | Northern Territory | 16 km² | 25 | 10 m |
| Brewis Island | Queensland | — | — | 7 m |
| Bribie Island | Queensland | 148 km² | 16,209 | 6 m |
| Bridge Rock | Tasmania | — | — | 1 m |
| Bridget Shoal | South Australia | — | — | 12 m |
| Bridgland Island | Northern Territory | — | — | 17 m |
| Brisk Island | Aboriginal Shire of Palm Island | 0.51 km² | — | 47 m |
| Brlei Island | Jayapura | 0.00 km² | — | — |
| Broadwater Island | New South Wales | — | — | 642 m |
| Brodie Cay | Queensland | — | — | 3 m |
| Bromby Islands | Northern Territory | — | — | 37 m |
| Bromby Islet | East Arnhem Region | — | — | 25 m |
| Bromsi Island | Biak Numfor | 12.1 km² | — | 86 m |
| Brown Island | Queensland | — | — | 3 m |
| Brown Islet | Northern Territory | — | — | 8 m |
| Browne Island | Queensland | — | — | 11 m |
| Browne Island | West Coast Region | — | 0 | 1 m |
| Browns Rock | City of Canterbury | — | — | 244 m |
| Bruibekwan Island | Supiori | 0.00 km² | — | — |
| Bruin | South Australia | — | — | 45 m |
| Bruny Island | Kingborough Council | 362 km² | 600 | 571 m |
| Bryce Island | New South Wales | — | — | 10 m |
| Buan Island | Fakfak | 0.03 km² | — | — |
| Buan Island | Fakfak | 0.03 km² | — | — |
| Buantawar Island | Fakfak | 0.01 km² | — | — |
| Buantawar Utara Island | Fakfak | 0.01 km² | — | — |
| Buar Island | Aru Islands Regency | 6.39 km² | — | — |
| Buchanan Island | Northern Territory | — | 0 | 18 m |
| Buchanan Island | Northern Territory | — | — | 3 m |
| Buckleys Rocks | Tasmania | — | — | 4 m |
| Bucky Island | New South Wales | — | — | 65 m |
| Budges Island | Marlborough District | — | — | 1 m |
| Buf Ganan Sawi Island | Raja Ampat | 0.01 km² | — | — |
| Buf Island | Raja Ampat | 0.04 km² | — | — |
| Buff Yefto Kapat Island | Raja Ampat | 0.00 km² | — | — |
| Buff Yefto Sapen Island | Raja Ampat | 0.00 km² | — | — |
| Buff Yefto Wasara Island | Raja Ampat | 0.00 km² | — | — |
| Bui Island | Teluk Bintuni | 13.1 km² | — | — |
| Bui Island | Tual | 0.52 km² | — | 38 m |
| Buiari Island | Milne Bay Province | 3.13 km² | — | 580 m |
| Buing Genan Island | Raja Ampat | 0.00 km² | — | — |
| Buing Island | Raja Ampat | 0.02 km² | — | — |
| Buka Island | Autonomous Region of Bougainville | 682 km² | 53,986 | 458 m |
| Bukakarung Besar Island | West Papua | 0.10 km² | — | — |
| Bukakarung Kecil Island | West Papua | 0.01 km² | — | — |
| Bukakarung Panjang Island | West Papua | 0.14 km² | — | — |
| Bulba-Dibeen | New South Wales | — | — | 8 m |
| Bulba-Gong | New South Wales | — | — | 13 m |
| Bull Island | New South Wales | — | — | 5 m |
| Bull Island | New South Wales | — | — | 1 m |
| Bull Island | Tasmania | — | — | 840 m |
| Bull Island | New South Wales | — | — | 79 m |
| Bull Island | South Australia | — | — | 6 m |
| Bull Island | Tasmania | — | — | 1 m |
| Bull Island | Queenstown Lakes District | — | — | 282 m |
| Bull Ring | Victoria | — | — | 9 m |
| Bullara | New South Wales | — | — | 44 m |
| Bullock Horn Islet | Victoria | — | — | 2 m |
| Bullock Island | Victoria | — | — | 1 m |
| Bulutuinunusa Island | Fakfak | 0.00 km² | — | — |
| Bulwer Island | Queensland | 1.20 km² | — | 10 m |
| Bulyong Island | South Australia | — | — | 20 m |
| Bum Beba Island | Supiori | 0.01 km² | — | — |
| Bum Kasun Island | Supiori | 0.01 km² | — | — |
| Bumaga Island | Northern Territory | — | — | 22 m |
| Bumbang Island | Victoria | — | — | 60 m |