| L'Hamecon | South Australia | — | — | 74 m |
| La Basse Terre | South Australia | — | — | 33 m |
| La Misere | South Australia | — | — | 58 m |
| La Navette | South Australia | — | — | 1 m |
| La Parasol | South Australia | — | — | 47 m |
| La Sentinelle | South Australia | — | — | 16 m |
| Laag Island | Asmat | — | — | 20 m |
| Laba Island | Raja Ampat | 0.00 km² | — | — |
| Labankwarisa Kaf Island | Aru Islands Regency | 0.00 km² | — | — |
| Labankwarisa Lase Island | Aru Islands Regency | 0.00 km² | — | — |
| Labankwarisa Ot Island | Aru Islands Regency | 0.00 km² | — | — |
| Labankwarisa Rua Island | Aru Islands Regency | 0.44 km² | — | — |
| Labobar Island | Tanimbar Islands | 7.11 km² | — | 20 m |
| Labu Islet | Northern Territory | — | — | 5 m |
| Labu Tapuran Island | Aru Islands Regency | 0.02 km² | — | — |
| Labu Terangan Island | Aru Islands Regency | 0.05 km² | — | — |
| Labuan Besar Island | West Papua | 0.03 km² | — | — |
| Labuan Karosi Utara Darat Island | West Papua | 0.00 km² | — | — |
| Labuan Kecil Island | West Papua | 0.01 km² | — | — |
| Labuankarosi Utara Besar Island | West Papua | 0.02 km² | — | — |
| Labuankarosi Utara Kecil Island | West Papua | 0.00 km² | — | — |
| Labulin Island | Southeast Maluku | 0.04 km² | — | 16 m |
| Labunlu Island | Raja Ampat | 0.00 km² | — | — |
| Lacey Island | Queensland | — | — | 35 m |
| Lady Alice Island | Northland Region | — | — | 158 m |
| Lady Elliot Island | Queensland | 0.45 km² | — | 5 m |
| Lady Island | Queensland | — | — | 22 m |
| Lady Julia Percy Island | Victoria | 1,330 km² | — | 38 m |
| Lady Musgrave Island | Queensland | 0.28 km² | 0 | 7 m |
| Ladysmith Island | Queensland | — | — | 52 m |
| Lae Atoll | Marshall Islands | 1.50 km² | 347 | — |
| Lage Genan Island | Raja Ampat | 3.82 km² | — | — |
| Lage Peley Island | Raja Ampat | 4.86 km² | — | 17 m |
| Lage Yes Island | Raja Ampat | 0.49 km² | — | — |
| Lagegenanyeben Island | Raja Ampat | 0.00 km² | — | — |
| Lagepeley Lu Island | Raja Ampat | 0.00 km² | — | — |
| Lageyes Atsa Island | Raja Ampat | 0.01 km² | — | — |
| Lageyes Genan Island | Raja Ampat | 0.01 km² | — | — |
| Lageyesyeben Island | Raja Ampat | 0.00 km² | — | — |
| Lagoon Island | Queensland | — | — | 5 m |
| Lai Di Island | Raja Ampat | 0.00 km² | — | — |
| Lai Island | Aru Islands Regency | 0.13 km² | — | — |
| Laidiatsa Island | Raja Ampat | 0.01 km² | — | — |
| Laidifat Island | Raja Ampat | 0.00 km² | — | — |
| Laidilu Island | Raja Ampat | 0.00 km² | — | — |
| Laiditol Island | Raja Ampat | 0.00 km² | — | — |
| Laika | Shefa | 1 km² | — | — |
| Lailai Mar Island | Aru Islands Regency | 0.05 km² | — | — |
| Lailai Patu Island | Aru Islands Regency | 0.02 km² | — | — |
| Laitot Island | Raja Ampat | 0.00 km² | — | — |
| Lakeba | Lau | 58.9 km² | 2,100 | — |
| Lakeside Island | Tasmania | — | — | 806 m |
| Lakofan Island | Aru Islands Regency | 0.06 km² | — | — |
| Lalel Kai Kapatcol Island | Raja Ampat | 0.00 km² | — | — |
| Lalelkai Island | Raja Ampat | 0.00 km² | — | — |
| Lalla Island | Raja Ampat | 0.03 km² | — | — |
| Lalya Island | Sorong | 0.15 km² | — | — |
| Lamberi Island | Teluk Wondama | 0.01 km² | — | — |
| Lambert Island | Victoria | — | — | 43 m |
| Lamella Island | New South Wales | — | — | 1,154 m |
| Lamen | Shefa | — | — | 18 m |
| Lamotrek | Yap State | 0.98 km² | — | — |
| Lampu Selatan Island | Tanimbar Islands | 0.00 km² | — | — |
| Lampu Utara Island | Tanimbar Islands | 0.00 km² | — | — |
| Lanambelana Island | Raja Ampat | 0.01 km² | — | — |
| Lanan Island | Raja Ampat | 0.00 km² | — | — |
| Landing Shoal | South Australia | — | — | 7 m |
| Lane Island | Northern Territory | — | — | 8 m |
| Langargwari Island | Aru Islands Regency | 0.00 km² | — | — |
| Langargwari Taitai Island | Aru Islands Regency | 0.00 km² | — | — |
| Langford Island | Queensland | — | — | 8 m |
| Langkisi Palyasancau Island | Raja Ampat | 0.01 km² | — | — |
| Langkisi Yef Tololo Island | Raja Ampat | 0.00 km² | — | — |
| Langkisi Yef Tonatao Island | Raja Ampat | 0.00 km² | — | — |
| Langton Island | South Australia | — | — | 9 m |
| Langurnguran Island | Aru Islands Regency | 0.01 km² | — | — |
| Lani Island | Fakfak | 5.68 km² | — | — |
| Lanis Island | New South Wales | — | — | 5 m |
| Lankisi Atsa Island | Raja Ampat | 0.02 km² | — | — |
| Lankisi Fat Island | Raja Ampat | 0.00 km² | — | — |
| Lankisi Lim Island | Raja Ampat | 0.01 km² | — | — |
| Lankisi Lu Island | Raja Ampat | 0.00 km² | — | — |
| Lankisi Tol Island | Raja Ampat | 0.03 km² | — | — |
| Lanlin Island | Raja Ampat | 0.00 km² | — | — |
| Lar Island | Aru Islands Regency | 1.51 km² | — | — |
| Larat Island | Tanimbar Islands | 215.5 km² | — | 109 m |
| Larbata Belakang Island | Aru Islands Regency | 0.14 km² | — | — |
| Larbata Muka Island | Aru Islands Regency | 0.02 km² | — | — |
| Larbata Tengah Island | Aru Islands Regency | 0.17 km² | — | — |
| Lase Atsa Island | Raja Ampat | 0.00 km² | — | — |
| Lase Fit Island | Raja Ampat | 0.00 km² | — | — |
| Lase Ganan Island | Raja Ampat | 0.01 km² | — | — |
| Lase Lim Island | Raja Ampat | 0.00 km² | — | — |
| Lase Pale Island | Raja Ampat | 0.01 km² | — | — |
| Lase Tol Island | Raja Ampat | 0.00 km² | — | — |
| Lase Wonom Island | Raja Ampat | 0.00 km² | — | — |
| Lasmanuk Island | Southeast Maluku | 0.00 km² | — | — |
| Latalola Besar | Indonesia | — | — | 9 m |
| Latalola Kecil | Indonesia | — | — | 9 m |
| Lataro | Sanma | 3.22 km² | — | 88 m |
| Late | Vava‘u | 18.5 km² | 0 | 540 m |
| Lathü | Sanma | — | — | 1 m |
| Latotdi Island | Raja Ampat | 0.00 km² | — | — |
| Laucala | Cakaudrove | 12 km² | 300 | — |
| Law Island | Northern Territory | — | — | 3 m |
| Lawagaikou Island | Aru Islands Regency | 0.00 km² | — | — |
| Lawat Island | Raja Ampat | 0.74 km² | — | 16 m |
| Lawatloloniyef Island | Raja Ampat | 0.01 km² | — | — |
| Lawson Island | Northern Territory | — | — | 7 m |
| Laxton Reef | Northern Territory | — | — | 2 m |
| Layoak Island | Queensland | 0.09 km² | 0 | 9 m |
| Le Pacifique | South Australia | — | — | 33 m |
| Le Postillon | South Australia | — | — | 30 m |
| Lea Island | Southeast Maluku | 0.21 km² | — | 21 m |
| Lear Island | Aru Islands Regency | 4.50 km² | — | 22 m |
| Leatimmalan Island | Raja Ampat | 0.00 km² | — | — |
| Lebetlolo Atsa Island | Raja Ampat | 0.02 km² | — | — |
| Lebetlolo Lu Island | Raja Ampat | 0.00 km² | — | — |
| Lebetlolo Tol Island | Raja Ampat | 0.02 km² | — | — |
| Lee Island | Southland District | — | — | 242 m |
| Leggatt Island | Queensland | — | — | 7 m |
| Leggs Island | New South Wales | — | — | 16 m |
| Lehuiwahia Island | Aru Islands Regency | 0.00 km² | — | — |
| Leicester Island | Queensland | — | — | 18 m |
| Lelam Island | Aru Islands Regency | 1.92 km² | — | — |
| Lelam Island | Aru Islands Regency | 1.92 km² | — | — |
| Lelam Kojabi Island | Aru Islands Regency | 0.29 km² | — | 16 m |
| Lelam Tuti Island | Aru Islands Regency | 0.14 km² | — | — |
| Lelena Reef | Milne Bay Province | — | — | 29 m |
| Lelepa | Vanuatu | 1.60 km² | 500 | 202 m |
| Leleur Island | Aru Islands Regency | 0.00 km² | — | — |
| Leleuvia | Lomaiviti | 0.07 km² | 0 | — |
| Leleyawar Dawan Island | Tanimbar Islands | 0.00 km² | — | — |
| Leleyawar Kou Island | Tanimbar Islands | 0.00 km² | — | — |
| Lemon Island | Manokwari | 0.15 km² | — | — |
| Len Island | Raja Ampat | 0.01 km² | — | — |
| Len Maralol Island | Raja Ampat | 0.04 km² | — | — |
| Len Sawi Island | Raja Ampat | 0.07 km² | — | — |
| Leng Balao Island | Raja Ampat | 0.00 km² | — | — |
| Lenggelalang Island | Raja Ampat | 0.11 km² | — | — |
| Lenggelalang Peley Island | Raja Ampat | 0.20 km² | — | — |
| Lengkalogos Kapatcol Katem Yasancao Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Nikapatcol Tonafatabuo Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Niyef Ganan Tonafatabuo Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Niyef Kacuo Palyasancao Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Niyef Pale Palyasancao Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Niyef Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Lengkalogos Yef Pale Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Lengleng Island | Fakfak | 0.00 km² | — | — |
| Lengleng Siak Island | Fakfak | 0.01 km² | — | — |
| Lengleng Temun Island | Fakfak | 0.00 km² | — | — |
| Lenkafal Atsa Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Fat Island | Raja Ampat | 0.02 km² | — | — |
| Lenkafal Fit Island | Raja Ampat | 0.01 km² | — | — |
| Lenkafal Island | Raja Ampat | — | — | 156 m |
| Lenkafal Lalel Toleya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Lim Island | Raja Ampat | 0.01 km² | — | — |
| Lenkafal Nikapatcol Kacuo Tobatanlapya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Nikapatcol Pallasancaya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Nikapatcol Totipnatao Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Niyef Ganan Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Niyef Pale Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Niyef Tolenya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Niyef Tomulya Island | Raja Ampat | 0.00 km² | — | — |
| Lenkafal Tol Island | Raja Ampat | 0.01 km² | — | — |
| Lenkafal Wonom Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Atsa Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Fat Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Fat Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Fit Island | Raja Ampat | 0.08 km² | — | — |
| Lenkalogos Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Lim Island | Raja Ampat | 0.01 km² | — | — |
| Lenkalogos Lim Island | Raja Ampat | 0.01 km² | — | — |
| Lenkalogos Lu Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Nikapatcolto Yasancopo Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Niyef To Istradpalolono Island | Raja Ampat | 0.00 km² | — | — |
| Lenkalogos Si Island | Raja Ampat | 0.03 km² | — | — |
| Lenkalogos Tol Island | Raja Ampat | 0.01 km² | — | — |
| Lenkalogos Tol Island | Raja Ampat | 0.01 km² | — | — |
| Lenkalogos Wal Island | Raja Ampat | 0.01 km² | — | — |
| Lenkalogos Wonom Island | Raja Ampat | 0.07 km² | — | — |
| Lenkalogos Wonom Island | Raja Ampat | 0.07 km² | — | — |
| Lenkalogos Yef Pale Tolaleltao Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Atsa Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Fat Island | Raja Ampat | 0.01 km² | — | — |
| Lenmakana Fit Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Ganan Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Island | Raja Ampat | 0.52 km² | — | — |
| Lenmakana Island | Raja Ampat | 0.52 km² | — | — |
| Lenmakana Kapatcol Kalawanat Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Kapatcol Laleltole Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Kapatcol Tolaleltao Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Lafa Island | Raja Ampat | 0.04 km² | — | — |
| Lenmakana Lafamaifat Island | Raja Ampat | 0.02 km² | — | — |
| Lenmakana Lafamaifit Island | Raja Ampat | 0.03 km² | — | — |
| Lenmakana Lafamailim Island | Raja Ampat | 0.01 km² | — | — |
| Lenmakana Lafamailu Island | Raja Ampat | 0.02 km² | — | — |
| Lenmakana Lafamaisa Island | Raja Ampat | 0.01 km² | — | — |
| Lenmakana Lafamaitol Island | Raja Ampat | 0.03 km² | — | — |
| Lenmakana Lafamaiwal Island | Raja Ampat | 0.12 km² | — | — |
| Lenmakana Lafamaiwonom Island | Raja Ampat | 0.06 km² | — | — |
| Lenmakana Lim Island | Raja Ampat | 0.01 km² | — | — |
| Lenmakana Lu Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Nikapatcol To Istradtolea Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Nikapatcol Totiplapo Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Nikapatcol Towasarau Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Niyef Tololya Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Niyefto Nafatabuo Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Rapattipyah Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Si Island | Raja Ampat | 0.01 km² | — | — |
| Lenmakana Tol Island | Raja Ampat | 0.16 km² | — | — |
| Lenmakana Wal Island | Raja Ampat | 0.17 km² | — | — |
| Lenmakana Wonom Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Yefto Lennatau Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Yefto Natatolea Island | Raja Ampat | 0.00 km² | — | — |
| Lenmakana Yefto Palolono Island | Raja Ampat | 0.00 km² | — | — |
| Lennards Island | New South Wales | — | — | 44 m |
| Leo Island | Raja Ampat | 0.04 km² | — | — |
| Lepisa Genan Island | Raja Ampat | 0.00 km² | — | — |
| Lepisa Peley Island | Raja Ampat | 0.02 km² | — | — |
| Les Compagnons | South Australia | — | — | 3 m |
| Lesi Island | Aru Islands Regency | 0.00 km² | — | — |
| Lesimano Island | Milne Bay Province | 0.21 km² | — | 37 m |
| Lesmanuk Island | Southeast Maluku | 0.00 km² | — | — |
| Lesser Pyramidal Rock | Tasmania | — | — | 110 m |
| Lewakai Island | Aru Islands Regency | 1.19 km² | — | 10 m |
| Lewis Island | South Australia | — | — | 39 m |
| Li Le Island | Raja Ampat | 0.02 km² | — | — |
| Li Lol Island | Raja Ampat | 0.00 km² | — | — |
| Li Palolon Island | Raja Ampat | 0.00 km² | — | — |
| Lib Island | Marshall Islands | 0.93 km² | 155 | — |
| Lif Island | New Ireland Province | 4 km² | — | — |
| Lifuka | Haʻapai district | 11.4 km² | 2,967 | — |
| Liguanea Island | South Australia | — | — | 43 m |
| Lihir Island | New Ireland Province | 205 km² | 18,000 | 700 m |
| Lijeturar Island | Aru Islands Regency | 0.13 km² | — | — |
| Lik Island | Southeast Maluku | 0.57 km² | — | 27 m |
| Liki Island | Sarmi | 13.2 km² | — | 155 m |
| Likiep Atoll | Likiep Atoll | 10.3 km² | 401 | 10 m |
| Lilliput Island | South Australia | — | — | 7 m |
| Lindeman Island | Queensland | — | — | 98 m |
| Lindeman Island Reef | Queensland | — | — | 1 m |
| Lindquist Island | Queensland | 0.07 km² | — | 17 m |
| Lindsay Island | Victoria | — | — | 26 m |
| Lingeleah Island | Queensland | 18.5 km² | — | 3 m |
| Lingham Island | Queensland | — | — | 8 m |
| Lingnoonganee Island | Queensland | 1,182 km² | — | 10 m |
| Link Island | Victoria | — | — | 179 m |
| Linne Island | Queensland | — | — | 131 m |
| Linua | Torba | 2.50 km² | — | 22 m |
| Lio Island | Sorong | 2.41 km² | — | — |
| Lion Island | Snowy River Shire | — | — | 922 m |
| Lion Island | New South Wales | — | — | 342 m |
| Lion Island | New South Wales | — | — | 27 m |
| Lion Rock | Tasmania | — | — | 145 m |
| Lions Island | New South Wales | — | — | 342 m |
| Lipson Island | South Australia | — | — | 4 m |
| Lisa Fufan Island | Aru Islands Regency | 5.83 km² | — | — |
| Lisa Vuvang Island | Aru Islands Regency | 0.02 km² | — | — |
| Little Adolphus Island | Queensland | — | — | 16 m |
| Little Allen Island | Queensland | 10.7 km² | — | — |
| Little Boomer | Tasmania | — | — | 3 m |
| Little Broughton Island | New South Wales | — | — | 53 m |
| Little Casey Island | Victoria | — | — | 180 m |
| Little Chalky Island | Tasmania | 5 km² | — | — |
| Little Christmas Island | Little Swanport | 2 km² | — | 8 m |
| Little Dog Island | Victoria | — | — | 3 m |
| Little Dog Island | Tasmania | — | — | 1 m |
| Little Elephant | Tasmania | — | — | 48 m |
| Little Fitzroy Island | Queensland | — | — | 6 m |
| Little Goat Island | Queensland | — | — | 10 m |
| Little Goat Island | New South Wales | — | — | 7 m |
| Little Hunchee Island | South Australia | — | — | 24 m |
| Little Island | Queensland | — | — | 2 m |
| Little Island | New South Wales | — | — | 100 m |
| Little Island | New South Wales | — | — | 1 m |
| Little Island | New South Wales | — | — | 4 m |
| Little Island | Northern Territory | — | — | 4 m |
| Little Island | Southland Region | — | — | 64 m |
| Little Key Island | Tasmania | — | — | 14 m |
| Little Lindeman Island | Queensland | — | — | 12 m |
| Little Louisa Islet | Tasmania | — | — | 106 m |
| Little Muttonbird Island | New South Wales | — | — | 6 m |
| Little Pig Island | Queensland | — | — | 6 m |
| Little Pimlico Island | South Australia | — | — | 103 m |
| Little Ram Island | Tasmania | — | — | 12 m |
| Little Rawdon Island | New South Wales | — | — | 2 m |
| Little Shark Island | New South Wales | — | — | 1 m |
| Little Snake Island | Victoria | — | — | 5 m |
| Little Swan Island | Tasmania | — | — | 13 m |
| Little Taylor Island | South Australia | — | — | 10 m |
| Little Waterhouse Island | Tasmania | — | 0 | — |
| Little Woody Island | Queensland | — | — | 43 m |
| Litultula Island | Aru Islands Regency | 0.03 km² | — | — |
| Lizard Island | Queensland | — | — | 239 m |
| Lizard Island Reef | Queensland | — | — | 22 m |
| Lloyd Island | Queensland | — | — | 19 m |
| Lo | Torba | 11.9 km² | 210 | 64 m |
| Loat 8 Island | Maluku | 0.00 km² | — | — |
| Lobbs Island | Victoria | — | — | 128 m |
| Lobinusa Island | Fakfak | 0.00 km² | — | — |
| Loca Atsa Island | Raja Ampat | 0.04 km² | — | — |
| Loca Fat Island | Raja Ampat | 0.02 km² | — | — |
| Loca Island | Raja Ampat | 0.03 km² | — | — |
| Loca Lim Island | Raja Ampat | 0.01 km² | — | — |
| Loca Lu Island | Raja Ampat | 0.00 km² | — | — |
| Loca Tol Island | Raja Ampat | 0.03 km² | — | — |
| Locahni Kapatcol Loya Torapatle Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Kapatcol To Nikaleketya Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Nikapatcol Tonatalolya Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Yefto Nikaleketya Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Yefto Palolono Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Yefto Wagalafo Island | Raja Ampat | 0.00 km² | — | — |
| Locahni Yefto Wasarau Island | Raja Ampat | 0.00 km² | — | — |
| Lock Island | Rural City of Mildura | — | — | 37 m |
| Locksmith Island | Queensland | — | — | 49 m |
| Locust Rock | Queensland | 0.82 km² | — | — |
| Loee Patches | Northern Territory | — | — | 6 m |
| Lof Bat Island | Raja Ampat | 0.00 km² | — | — |
| Lofon Island | Raja Ampat | 0.12 km² | — | 13 m |
| Logea | Milne Bay Province | 9.02 km² | — | 1,215 m |
| Loi Island | Aru Islands Regency | 0.02 km² | — | — |
| Lojalintokalogos Island | Raja Ampat | 0.13 km² | — | — |
| Lojalintokalogos Les Island | Raja Ampat | 0.00 km² | — | — |
| Lojalintokalogos Lol Island | Raja Ampat | 0.00 km² | — | — |
| Lokulaulau | Central Province | — | — | 13 m |
| Lola Island | Aru Islands Regency | 0.08 km² | — | — |
| Lolaatmetem Island | Raja Ampat | 0.00 km² | — | — |
| Lolaatmetem Lol Island | Raja Ampat | 0.00 km² | — | — |
| Lolabus Island | Raja Ampat | 0.00 km² | — | — |
| Lolobau Island | West New Britain Province | 56 km² | — | 858 m |
| Lolow Island | Raja Ampat | 0.00 km² | — | — |
| Lomar Island | Aru Islands Regency | 0.25 km² | — | — |
| Lomar Island | Aru Islands Regency | 0.00 km² | — | — |
| Lone Island | New South Wales | — | — | 4 m |
| Long Island | Madang Province | 500 km² | 1,000 | 1,280 m |
| Long Island | Tasmania | 313 km² | — | 1 m |
| Long Island | Southland District | 19.0 km² | — | — |
| Long Island | Marlborough District | 1.41 km² | 0 | 152 m |
| Long Island | Queensland | — | — | 218 m |
| Long Island | South Australia | — | — | 2 m |
| Long Island | South Australia | — | — | 9 m |
| Long Island | Queensland | — | — | 72 m |
| Long Island | Queensland | — | — | 4 m |
| Long Island | Queensland | — | — | 7 m |
| Long Island | Queensland | — | — | 2 m |
| Long Island | Victoria | — | — | 2 m |
| Long Island | Queensland | — | — | 5 m |
| Long Island | New South Wales | — | — | 571 m |
| Long Island | New South Wales | — | — | 9 m |
| Long Island | New South Wales | — | — | 1 m |
| Long Island | New South Wales | — | — | 20 m |
| Long Island | Queensland | — | — | 18 m |
| Long Island | Queensland | — | — | 285 m |
| Long Island | South Australia | — | — | 8 m |
| Long Island | Victoria | — | — | 16 m |
| Long Island | Victoria | — | — | 4 m |
| Longar Guari Island | Aru Islands Regency | 0.22 km² | — | — |
| Longwang Island | South Australia | — | — | 22 m |
| Lopevi | Malampa | 29 km² | — | 1,413 m |
| Lor An Reet Island | Southeast Maluku | 0.01 km² | — | — |
| Loran Kwakwa Island | Aru Islands Regency | 0.00 km² | — | — |
| Lorbi Island | Tual | 0.00 km² | — | — |
| Lord Howe Island | New South Wales | 14.6 km² | 445 | 59 m |
| Lorna Shoal | Northern Territory | — | — | 6 m |
| Los Island | Raja Ampat | 0.00 km² | — | — |
| Loslos Island | Sorong | 0.03 km² | — | 7 m |
| Lou Island | Manus Province | 32 km² | 1,000 | — |
| Louisa Island | Tasmania | 23 km² | — | 80 m |
| Loulia Island | Aru Islands Regency | 0.04 km² | — | — |
| Lourah Island | Tasmania | — | — | 15 m |
| Louth Island | South Australia | — | — | 11 m |
| Lovers Islets | Tasmania | — | — | 1 m |
| Low Island | Queensland | 0.02 km² | — | 9 m |
| Low Island | Queensland | — | — | 3 m |
| Low Island | Northern Territory | — | — | 5 m |
| Low Island | Queensland | — | — | 11 m |
| Low Islands Reef | Queensland | — | — | 2 m |
| Low Islets | Tasmania | 2 km² | — | — |
| Low Wooded Island | Queensland | 0.45 km² | — | 9 m |
| Lowau Gwa Gwa Island | Aru Islands Regency | 0.12 km² | — | — |
| Lowau Gwauka Janjakai Island | Aru Islands Regency | 0.14 km² | — | — |
| Lowau Gwauka Yanyanai Island | Aru Islands Regency | 0.14 km² | — | — |
| Lowrie Islet | Queensland | — | — | 12 m |
| Lowry Shoal | Northern Territory | — | — | 6 m |
| Lubowuwun Island | Aru Islands Regency | 0.00 km² | — | — |
| Lucabano Les Island | Raja Ampat | 0.00 km² | — | — |
| Lucabano Lol Island | Raja Ampat | 0.01 km² | — | — |
| Lucerne Island | South Australia | — | — | 2 m |
| Lugo Island | Sorong | 0.24 km² | — | 9 m |
| Lugo Kecil Island | Sorong | 0.01 km² | — | — |
| Lulof Rock | Tasmania | — | — | 260 m |
| Lulutor Island | Aru Islands Regency | 0.00 km² | — | — |
| Lum | Indonesia | — | — | 18 m |
| Lum Island | Raja Ampat | 0.23 km² | — | 27 m |
| Lumalol Island | Raja Ampat | 0.22 km² | — | 19 m |
| Lumms Island | Victoria | — | — | 141 m |
| Luna Island | New South Wales | — | — | 1 m |
| Lung Island | Queensland | — | — | 14 m |
| Lunn Island | Milne Bay Province | 0.51 km² | — | — |
| Lupton Island | Queensland | — | — | 54 m |
| Lusby Island | South Australia | — | — | 9 m |
| Luthrie Island | New South Wales | — | — | 3 m |
| Lutuhabil Island | Aru Islands Regency | 0.76 km² | — | — |
| Lutulolo Ganan Island | Raja Ampat | 0.03 km² | — | — |
| Lutulolo Island | Raja Ampat | 0.02 km² | — | — |
| Lutulolo Palay Island | Raja Ampat | 0.05 km² | — | — |
| Lutulolo Pat Island | Raja Ampat | 0.01 km² | — | — |
| Luturdalam Island | Tanimbar Islands | 0.00 km² | — | — |
| Luvatfit Island | Tual | 0.00 km² | — | — |
| Luvatlim Island | Tual | 0.00 km² | — | — |
| Luvatru Island | Tual | 0.00 km² | — | — |
| Luvatsiu Island | Tual | 0.01 km² | — | — |
| Luvatvut Island | Tual | 0.00 km² | — | — |