# Recursive islands and lakes

A recursive island or lake, also known as a nested island or lake, is an island or a lake that lies within a lake or an island. For the purposes of defining recursion, small continental land masses such as Madagascar and New Zealand count as islands, while large continental land masses such as Australia do not. Islands found within lakes in these countries are often recursive islands because the lake itself is located on an island.

## Recursive islands
### Islands in lakes

| Island | In lake | Country | Area (km$^2$) | Coordinates | Notes |
| Manitoulin Island | Lake Michigan–Huron | Canada | 2,766 | 45°39′8″N 82°06′32″W﻿ / ﻿45.65222°N 82.10889°W﻿ / 45.65222; -82.10889 | Largest lake island in the world |
| René-Levasseur Island | Manicouagan Reservoir | Canada | 2,020 | 51°23′50″N 68°41′30″W﻿ / ﻿51.39722°N 68.69167°W﻿ / 51.39722; -68.69167 | The island is artificial as the lake it is in was made by flooding a smaller existing lake due to the creation of the Daniel-Johnson dam. |
| Soisalo | spread across several lakes | Finland | 1,638 | 62°28′58″N 28°7′53″E﻿ / ﻿62.48278°N 28.13139°E﻿ / 62.48278; 28.13139 | The largest island in continental Finland. It has shores to four different lakes (Kallavesi, Unnukka, Suvasvesi and Kermajärvi), but they are not all at the same level. |
| Sääminginsalo | Saimaa | Finland | 1,090 | 61°58′58″N 29°4′53″E﻿ / ﻿61.98278°N 29.08139°E﻿ / 61.98278; 29.08139 | Separated from one side by an artificial canal (Raikuu canal). |
| Olkhon Island | Lake Baikal | Russia | 730 | 53°9′24″N 107°23′1″E﻿ / ﻿53.15667°N 107.38361°E﻿ / 53.15667; 107.38361 | |
| Isle Royale | Lake Superior | United States | 535 | 48°0′0″N 88°55′0″W﻿ / ﻿48.00000°N 88.91667°W﻿ / 48.00000; -88.91667 | |
| Ukerewe Island | Lake Victoria | Tanzania | 530 | 2°1′46″S 33°0′36″E﻿ / ﻿2.02944°S 33.01000°E﻿ / -2.02944; 33.01000 | |
| St. Joseph Island | Lake Michigan–Huron | Canada | 365 | 46°13′11″N 83°56′47″W﻿ / ﻿46.21972°N 83.94639°W﻿ / 46.21972; -83.94639 | |
| Drummond Island | Lake Michigan–Huron | United States | 347 | 46°0′0″N 83°40′0″W﻿ / ﻿46.00000°N 83.66667°W﻿ / 46.00000; -83.66667 | |
| Idjwi | Lake Kivu | DR Congo | 340 | 2°9′58″S 29°3′21″E﻿ / ﻿2.16611°S 29.05583°E﻿ / -2.16611; 29.05583 | |
| Kotasaari | Kallavesi | Finland | 285 | 62°52′52″N 28°0′23″E﻿ / ﻿62.88111°N 28.00639°E﻿ / 62.88111; 28.00639 | Separated from one side by an artificial canal (Summa canal). |
| Ometepe | Lake Nicaragua | Nicaragua | 276 | 11°30′0″N 85°35′0″W﻿ / ﻿11.50000°N 85.58333°W﻿ / 11.50000; -85.58333 | Made of two conjoined volcanic islands |
| Zapatera | Lake Nicaragua | Nicaragua | 54 | 11°43′48″N 85°49′12″W﻿ / ﻿11.73000°N 85.82000°W﻿ / 11.73000; -85.82000 | |
| Big Island | Lake of the Woods | Canada | ~200 | 61°07′45″N 116°45′24″W﻿ / ﻿61.12917°N 116.75667°W﻿ / 61.12917; -116.75667 | |
| Mercer Island | Lake Washington | United States | 33.4 | 47°34′39″N 122°12′43.2″W﻿ / ﻿47.57750°N 122.212000°W﻿ / 47.57750; -122.212000 | Crossed by the Lacey V. Murrow Memorial Bridge, the second longest floating bridge in the world. |
| Duck Island | Green Lake | United States | | 47°40′45.9804″N 122°20′28.9098″W﻿ / ﻿47.679439000°N 122.341363833°W﻿ / 47.679439000; -122.341363833 | |
| Wizard Island | Crater Lake | United States | 1.3 | 42°56′19″N 122°08′44″W﻿ / ﻿42.93861°N 122.14556°W﻿ / 42.93861; -122.14556 | Crater Lake itself is a caldera formed by the eruption of Mount Mazama; a series of smaller eruptions later formed cinder cones on the caldera floor, of which Wizard Island is the highest, and the only one now visible above the lake's surface. |
| — | Orba Co | China | | 34°32′44″N 81°2′21″E﻿ / ﻿34.54556°N 81.03917°E﻿ / 34.54556; 81.03917 | Highest-elevation islands in the world. There are three islands of quite similar size. |
| Silcox Island | American Lake | United States | | 47°07′44″N 122°33′53″W | There are residents that live on this island, there is no ferry service to them. |

### Islands in lakes on islands

There are nearly 1,000 islands in lakes on islands in Finland alone.
| Name | In lake | On island | Country | Area (km$^2$) | Coordinates | Notes |
| Samosir | Lake Toba | Sumatra | Indonesia | 630 | 2°35′0″N 98°49′0″E﻿ / ﻿2.58333°N 98.81667°E﻿ / 2.58333; 98.81667 | Largest island in a lake on an island. Manmade from digging canal |
| Gatter Island | Lake Hazen | Ellesmere Island | Canada | 0.2 | 81°55′5″N 69°05′35″W﻿ / ﻿81.91806°N 69.09306°W﻿ / 81.91806; -69.09306 | |
| Glover Island | Grand Lake | Newfoundland | Canada | 178 | 48°46′52″N 57°41′54″W﻿ / ﻿48.78111°N 57.69833°W﻿ / 48.78111; -57.69833 | Largest naturally occurring island in a lake on an island. |
| Motutaiko Island | Lake Taupō | North Island | New Zealand | 0.11 | 38°51′17″S 175°56′36″E﻿ / ﻿38.85472°S 175.94333°E﻿ / -38.85472; 175.94333 | |
| Goodin Island | Lake Campbell | Fidalgo Island | United States | 0.09 | 48.4384258, -122.6168703 | |
| Mokoia Island | Lake Rotorua | North Island | New Zealand | 1.35 | 38°04′50″S 176°17′05″E﻿ / ﻿38.08056°S 176.28472°E﻿ / -38.08056; 176.28472 | |
| Rahui Island | Lake Waikareiti | North Island | New Zealand | | 38°42′45″S 177°10′30″E﻿ / ﻿38.71250°S 177.17500°E﻿ / -38.71250; 177.17500 | Largest of several islets in Lake Waikareiti |
| Mou Waho | Lake Wanaka | South Island | New Zealand | 1.2 | 44°33′10″S 169°04′50″E﻿ / ﻿44.55278°S 169.08056°E﻿ / -44.55278; 169.08056 | Largest of several islets in Lake Wanaka, including Stevensons Island |
| Pigeon Island | Lake Wakatipu | South Island | New Zealand | 1.7 | 44°55′30″S 168°23′50″E﻿ / ﻿44.92500°S 168.39722°E﻿ / -44.92500; 168.39722 | Largest of several islets in Lake Wakatipu, including Pig Island / Mātau and Hidden Island |
| Pomona Island | Lake Manapouri | South Island | New Zealand | 2.6 | 45°30′30″S 167°28′30″E﻿ / ﻿45.50833°S 167.47500°E﻿ / -45.50833; 167.47500 | Largest of several islets in Lake Manapouri; largest lake island in New Zealand |
| Motmot Island | Lake Wisdom | Long Island | Papua New Guinea | 0.04 | 5°21′8″S 147°7′2″E﻿ / ﻿5.35222°S 147.11722°E﻿ / -5.35222; 147.11722 | |
| — | West Lake | Brownsea Island | United Kingdom | 0.0008 | 50°41′34″N 1°58′21″W﻿ / ﻿50.69278°N 1.97250°W﻿ / 50.69278; -1.97250 | |
| Belle Isle | Windermere | Great Britain | United Kingdom | 0.17 | 54°21′43″N 2°56′4″W﻿ / ﻿54.36194°N 2.93444°W﻿ / 54.36194; -2.93444 | |
| Storgrynnan | Vandöfjärden | Fasta Åland | Finland | 0.12 | 60°17′46″N 19°55′12″E﻿ / ﻿60.29611°N 19.92000°E﻿ / 60.29611; 19.92000 | |
| — | Senanayaka Samudra | Sri Lanka | Sri Lanka | 0.02 | 7°12′0″N 81°31′10″E﻿ / ﻿7.20000°N 81.51944°E﻿ / 7.20000; 81.51944 | |
| Derrywarragh Island | Lough Neagh | Ireland | United Kingdom | 0.56 | 54°30′57″N 6°34′11″W﻿ / ﻿54.51583°N 6.56972°W﻿ / 54.51583; -6.56972 | |
| Boa Island | Lower Lough Erne | Ireland | United Kingdom | 5.3 | 54°31′27″N 7°47′57″W﻿ / ﻿54.5241°N 7.79921°W﻿ / 54.5241; -7.79921 | Largest lake island of the United Kingdom and inland island of Ireland |
| Sveta Marija | Veliko jezero | Mljet | Croatia | 0.017 | 42°46′8″N 17°21′37″E﻿ / ﻿42.76889°N 17.36028°E﻿ / 42.76889; 17.36028 | |
| Chikubu Island | Lake Biwa | Honshu | Japan | 0.14 | 35°25′20″N 136°8′37″E﻿ / ﻿35.42222°N 136.14361°E﻿ / 35.42222; 136.14361 | |
| Takeshima | Lake Biwa | Honshu | Japan | 0.6 | 35°17′47″N 136°10′41″E﻿ / ﻿35.29639°N 136.17806°E﻿ / 35.29639; 136.17806 | |
| Okishima | Lake Biwa | Honshu | Japan | 1.51 | 35°12′28″N 136°3′58″E﻿ / ﻿35.20778°N 136.06611°E﻿ / 35.20778; 136.06611 | Largest of the three islands located within Lake Biwa, which is Japan's largest lake. |
| Nakajima (Lake Kussharo) | Lake Kussharo | Hokkaido | Japan | 5.81 | 43°37′56″N 144°18′20″E﻿ / ﻿43.63222°N 144.30556°E﻿ / 43.63222; 144.30556 | Largest recursive island in Japan |
| Nakajima (Lake Toya) | Lake Tōya | Hokkaido | Japan | 4.84 | 42°36′07″N 140°51′11″E﻿ / ﻿42.60194°N 140.85306°E﻿ / 42.60194; 140.85306 | |
| Takeshima | Lake Biwa | Honshu | Japan | 0.6 | 35°17′47″N 136°10′41″E﻿ / ﻿35.29639°N 136.17806°E﻿ / 35.29639; 136.17806 | |
| Okinajima | Lake Inawashiro | Honshu | Japan | 0.07 | 37°30′33″N 140°02′15″E﻿ / ﻿37.50917°N 140.03750°E﻿ / 37.50917; 140.03750 | |
| Loeha Island | Lake Towuti | Sulawesi | Indonesia | 12.5 | 2°46′22″S 121°32′51″E﻿ / ﻿2.77278°S 121.54750°E﻿ / -2.77278; 121.54750 | |
| Lalu Island | Sun Moon Lake | Nantou | Taiwan | 0.882 | 23°51′20″N 120°54′40″E﻿ / ﻿23.85556°N 120.91111°E﻿ / 23.85556; 120.91111 | |
| Yufei Island | Qingcao Lake | Hsinchu | Taiwan | 0.00425 | 24°46′29″N 120°58′18″E﻿ / ﻿24.77472°N 120.97167°E﻿ / 24.77472; 120.97167 | |
| — | Kasegalik Lake | Flaherty Island | Canada | | | There are several other islands in that lake. |
| Isla Cabritos | Lago enriquillo | Hispaniola | Dominican Republic | 16.67 | 18°29'22''N 71°40'56''W | |
| — | — | Cat Ba Island | Vietnam | 0.0005 | 20°46'54"N 107°05'30"E | There is a smaller one, right at the south of it. |
| — | Blöndulón | Iceland | Iceland | | | There are nine other islands in this lake, all significantly smaller than this one. |

### Islands in lakes on islands in lakes

| Name | In lake | On island | In lake | Country | Area (km$^2$) | Coordinates | Notes |
| Kokkosaari | Kokkohauta | Sääminginsalo | Saimaa | Finland | 0.88 | 61°59′20″N 29°12′55″E﻿ / ﻿61.98889°N 29.21528°E﻿ / 61.98889; 29.21528 | Claimed to be the world's largest island in a lake on an island in a lake. Another island, Suursaari (62°5′28″N 28°59′28″E﻿ / ﻿62.09111°N 28.99111°E﻿ / 62.09111; 28.99111) in Hanhijärvi, is also located in Sääminginsalo, and is about half the size of Kokkosaari. Separated by an artificial canal, Sääminginsalo might not be considered an island. |
| — | Lake Chaunoy (Lac du Chaunoy) | René-Levasseur Island | Manicouagan Reservoir | Canada | 0.44 | 51°33′5″N 68°49′8″W﻿ / ﻿51.55139°N 68.81889°W﻿ / 51.55139; -68.81889 | René-Levasseur Island is an artificial island, formed when the Manicouagan reservoir was flooded in 1970. There are also more than 10 other smaller islands in Lake Chaunoy, the largest of which is less than a tenth of the size of the one listed here. |
| Treasure Island | Lake Mindemoya | Manitoulin Island | Lake Michigan–Huron | Canada | 0.4 | 45°45′50″N 82°10′41″W﻿ / ﻿45.76389°N 82.17806°W﻿ / 45.76389; -82.17806 | Largest natural island on a lake on an island on a lake. |
| Kakawaie Island | Lake Kagawong | Manitoulin Island | Lake Michigan–Huron | Canada | 0.24 | 45°48′45″N 82°18′22″W﻿ / ﻿45.81250°N 82.30611°W﻿ / 45.81250; -82.30611 | |
| Ryan Island | Siskiwit Lake | Isle Royale | Lake Superior | United States | 0.141 | 48°0′36″N 88°46′15″W﻿ / ﻿48.01000°N 88.77083°W﻿ / 48.01000; -88.77083 | Largest island in the largest lake on the largest island in the largest lake in the world (Lake Superior) |
| — | Second Lake | Drummond Island | Lake Michigan–Huron | United States | 0.044 | 46°03′2″N 83°35′55″W﻿ / ﻿46.05056°N 83.59861°W﻿ / 46.05056; -83.59861 | |
| — | Mackaysee Lake | Chambers Island | Green Bay, Lake Michigan | United States | 0.009 | 45°11′41″N 87°20′43″W﻿ / ﻿45.19472°N 87.34528°W﻿ / 45.19472; -87.34528 | |
| — | Frith Lake | Kelvin Island | Lake Nipigon | Canada | 0.0013 | 49°52′29″N 88°40′53″W﻿ / ﻿49.87472°N 88.68139°W﻿ / 49.87472; -88.68139 |
| Piiroonsaari | Saravesi | Kotasaari | Kallavesi | Finland | 0.22 | 62°50′41″N 28°4′36″E﻿ / ﻿62.84472°N 28.07667°E﻿ / 62.84472; 28.07667 | Separated by an artificial canal, Kotasaari might not be considered an island. |
| Suurisaari | Oininki | Äitsaari | Saimaa | Finland | 0.14 | | |
| Ukonsaari | Kulkemus | Partalansaari | Pihlajavesi (Saimaa) | Finland | .12 | 61°40′9″N 28°23′43″E﻿ / ﻿61.66917°N 28.39528°E﻿ / 61.66917; 28.39528 | |
| — | Lake Cancy | René-Levasseur Island | Manicouagan Reservoir | Canada | 0.011 | 51°33′21″N 68°50′52″W﻿ / ﻿51.55583°N 68.84778°W﻿ / 51.55583; -68.84778 | |
| — | Lac des Pigamons | Îlots Walcott | Lake Mistassini | Canada | 0.0002 | 51°07′18″N 73°21′34″W﻿ / ﻿51.12167°N 73.35944°W﻿ / 51.12167; -73.35944 | |
| — | — | Wilson Island | Great Slave Lake | Canada | 0.011 | 61°50′7″N 112°46′57″W﻿ / ﻿61.83528°N 112.78250°W﻿ / 61.83528; -112.78250 | |
| Raaskasaari | Kylliönjärvi | Viljakansaari | Pihlajavesi (Saimaa) | Finland | 0.05 | 61°33′53″N 28°22′56″E﻿ / ﻿61.56472°N 28.38222°E﻿ / 61.56472; 28.38222 | |
| — | — | Kållandsö | Vänern | Sweden | 0.0027 | 58°41′52″N 13°11′18″E﻿ / ﻿58.69778°N 13.18833°E﻿ / 58.69778; 13.18833 | There is a second island in the lake, almost the exact same size |
| Ösjöholmen | Ösjön | Ammerön | Revsundssjön | Sweden | 0.008 | 62°51′57″N 15°10′23″E﻿ / ﻿62.86583°N 15.17306°E﻿ / 62.86583; 15.17306 | |
| — | — | Tynnelsö | Mälaren | Sweden | 0.0005 | 59°25′1″N 17°04′44″E﻿ / ﻿59.41694°N 17.07889°E﻿ / 59.41694; 17.07889 | |
| — | — | — | Lake Kovdozero | Russia | 0.0162 | 66°45′23″N 31°58′37″E﻿ / ﻿66.75639°N 31.97694°E﻿ / 66.75639; 31.97694 | |
| — | — | Shaganappie Island | Wollaston Lake | Canada | 0.0066 | 58°22′22″N 102°57′51″W﻿ / ﻿58.37278°N 102.96417°W﻿ / 58.37278; -102.96417 | |
| — | Calder Lake | Malcolm Island | Reindeer Lake | Canada | 0.0154 | 56°58′24″N 102°8′1″W﻿ / ﻿56.97333°N 102.13361°W﻿ / 56.97333; -102.13361 | |
| — | — | Ispatinow Island | Cree Lake | Canada | 0.00019 | 57°27′40″N 106°40′47″W﻿ / ﻿57.46111°N 106.67972°W﻿ / 57.46111; -106.67972 | |
| — | — | Blanchet Island | Great Slave Lake | Canada | 0.01 | 61°59′40″N 112°30′56″W﻿ / ﻿61.99444°N 112.51556°W﻿ / 61.99444; -112.51556 | Several small islands in this lake |
| — | Vanooyen Lake | Shakespeare Island | Lake Nipigon | Canada | 0.0182 | 49°39′36″N 88°24′10″W﻿ / ﻿49.66000°N 88.40278°W﻿ / 49.66000; -88.40278 | There is a second, smaller island in this lake. |
| — | Margaret Lake | Elk Island | God's Lake | Canada | 0.00095 | 54°39′32″N 94°10′44″W﻿ / ﻿54.65889°N 94.17889°W﻿ / 54.65889; -94.17889 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.0006 | 54°39′29″N 94°10′37″W﻿ / ﻿54.65806°N 94.17694°W﻿ / 54.65806; -94.17694 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.0002 | 54°39′29″N 94°10′34″W﻿ / ﻿54.65806°N 94.17611°W﻿ / 54.65806; -94.17611 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.00015 | 54°39′29″N 94°10′33″W﻿ / ﻿54.65806°N 94.17583°W﻿ / 54.65806; -94.17583 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.00002–5 | 54°39′29″N 94°10′39″W﻿ / ﻿54.65806°N 94.17750°W﻿ / 54.65806; -94.17750 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.00004–10 | 54°39′26″N 94°10′44″W﻿ / ﻿54.65722°N 94.17889°W﻿ / 54.65722; -94.17889 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000015-50 | 54°39′27″N 94°10′31″W﻿ / ﻿54.65750°N 94.17528°W﻿ / 54.65750; -94.17528 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000005-20 | 54°39′32″N 94°10′25″W﻿ / ﻿54.65889°N 94.17361°W﻿ / 54.65889; -94.17361 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000005–20 | 54°39′36″N 94°10′36″W﻿ / ﻿54.66000°N 94.17667°W﻿ / 54.66000; -94.17667 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000005-20 | 54°39′43″N 94°11′03″W﻿ / ﻿54.66194°N 94.18417°W﻿ / 54.66194; -94.18417 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000005–20 | 54°39′42″N 94°11′05″W﻿ / ﻿54.66167°N 94.18472°W﻿ / 54.66167; -94.18472 | Several small islands in this lake |
| – | Margaret Lake | Elk Island | God's Lake | Canada | ~0.000001–5 | 54°39′43″N 94°10′57″W﻿ / ﻿54.66194°N 94.18250°W﻿ / 54.66194; -94.18250 | Several small islands in this lake |
| — | — | Ile Guillaume Couture | Lac Mistassini | Canada | 0.0017 | 50°55′1″N 73°37′32″W﻿ / ﻿50.91694°N 73.62556°W﻿ / 50.91694; -73.62556 | |
| — | — | Ile Tchapahipane | Lac Mistassini | Canada | 0.00125 | 51°4′34″N 73°25′25″W﻿ / ﻿51.07611°N 73.42361°W﻿ / 51.07611; -73.42361 | |
| — | — | Pie Island | Lac Mistassini | Canada | 0.0086 | 48°13′58″N 89°3′26″W﻿ / ﻿48.23278°N 89.05722°W﻿ / 48.23278; -89.05722 | Two islands of similar size are in this lake |
| — | Muir Lake | St Ignace Island | Lake Superior | Canada | 0.00325 | 48°48′28″N 88°2′3″W﻿ / ﻿48.80778°N 88.03417°W﻿ / 48.80778; -88.03417 | |
| — | Antler Lake | St Ignace Island | Lake Superior | Canada | 0.0041 | 48°48′59″N 88°0′5″W﻿ / ﻿48.81639°N 88.00139°W﻿ / 48.81639; -88.00139 | Two islands of similar size are in this lake |
| — | Williamson Lake | St Ignace Island | Lake Superior | Canada | 0.00425 | 48°48′4″N 88°1′39″W﻿ / ﻿48.80111°N 88.02750°W﻿ / 48.80111; -88.02750 | |
| — | Molinski Lake | Simpson Island | Lake Superior | Canada | 0.01 | 48°49′13″N 87°42′51″W﻿ / ﻿48.82028°N 87.71417°W﻿ / 48.82028; -87.71417 | |
| — | Caribou Lake | Simpson Island | Lake Superior | Canada | 0.00465 | 48°45′51″N 87°39′33″W﻿ / ﻿48.76417°N 87.65917°W﻿ / 48.76417; -87.65917 | |
| — | Veronica Lake | Slate Islands | Lake Superior | Canada | 0.0065 | 48°39′28″N 86°59′23″W﻿ / ﻿48.65778°N 86.98972°W﻿ / 48.65778; -86.98972 | |
| — | Michi Lake | Michipicoten Island | Lake Superior | Canada | 0.0037 | 47°44′28″N 85°54′29″W﻿ / ﻿47.74111°N 85.90806°W﻿ / 47.74111; -85.90806 | There are three islands in total in this lake |
| — | Channel Lake | Michipicoten Island | Lake Superior | Canada | 0.0084 | 47°43′50″N 85°48′0″W﻿ / ﻿47.73056°N 85.80000°W﻿ / 47.73056; -85.80000 | A second, smaller island is immediately to the west of this one. |
| — | — | — | Knielinger See | Germany | 0.0003 | 49°01′52.5″N 8°18′34.3″E﻿ / ﻿49.031250°N 8.309528°E﻿ / 49.031250; 8.309528 | |
| — | — | Wizard Island | Crater Lake | United States | | | |
| — | Lac Civic | Île Bronson | Réservoir Cabonga | Canada | | | There are other islands in lakes on islands in Cabonga. |
| – | – | – | Dubawnt Lake | Canada | | 63°15′36″N 101°08′08″W﻿ / ﻿63.26000°N 101.13556°W﻿ / 63.26000; -101.13556 | Viewable on Google Earth only. As of 10 July 2024 (according to Google Earth data), the island did not collide with its island. |

### Islands in lakes on islands in lakes on islands

| Name | In lake | On island | In lake | On island | Country | Area (m$^2$) | Coordinates | Notes |
| — | — | — | Nettilling Lake | Baffin Island | Canada | 40,000 | 66°41′15″N 70°28′48″W﻿ / ﻿66.68750°N 70.48000°W﻿ / 66.68750; -70.48000 | There are more islands in lakes on the 'level 2' island in Nettling Lake. |
| — | — | — | — | Victoria Island | Canada | 16,000 | 69°47′32″N 108°14′26″W﻿ / ﻿69.79222°N 108.24056°W﻿ / 69.79222; -108.24056 | Sometimes unofficially referred to as Inception Island. |
| — | Aek Natonang (Locally Sidihoni Lake) | Samosir | Lake Toba | Sumatra | Indonesia | 13,125 | 2°33′52″N 98°53′0″E﻿ / ﻿2.56444°N 98.88333°E﻿ / 2.56444; 98.88333 | Two islands, the largest of which is 175 m by 75 m. |
| — | — | — | — | King William Island | Canada | 12,000 | 69°27′39″N 97°35′43″W﻿ / ﻿69.46083°N 97.59528°W﻿ / 69.46083; -97.59528 | One circular island, which is around 120m in diameter |
| — | — | Glover Island | Grand Lake | Newfoundland | Canada | 7,500 | 48°47′48″N 57°39′28″W﻿ / ﻿48.79667°N 57.65778°W﻿ / 48.79667; -57.65778 | There are several (at least seven) other, even smaller, islets in the lake |
| — | — | — | — | Baffin Island | Canada | 3,000 | 64°47′32″N 75°25′11″W﻿ / ﻿64.79222°N 75.41972°W﻿ / 64.79222; -75.41972 | One circular island, which is around 60m in diameter |
| — | — | Glover Island | Grand Lake | Newfoundland | Canada | 2,300 | 48°43′8″N 57°46′23″W﻿ / ﻿48.71889°N 57.77306°W﻿ / 48.71889; -57.77306 | In a lake 11 km south west to the lake that contains the larger island. There are no other island in this island's lake |
| — | — | — | Meelpaeg Reservoir | Newfoundland | Canada | 100 | 48°18′44″N 56°30′48″W﻿ / ﻿48.31222°N 56.51333°W﻿ / 48.31222; -56.51333 | There are 3 other smaller islands in the same lake. |
| — | Arethusa Pool | Mou Waho | Lake Wānaka | South Island | New Zealand | 225 | 44°33′15″S 169°05′3″E﻿ / ﻿44.55417°S 169.08417°E﻿ / -44.55417; 169.08417 | There are two islands in this lake, both less than 25 m across. |
| — | — | Eilean Sùbhainn | Loch Maree | Great Britain | United Kingdom | 225 | 57°41′24″N 5°29′9″W﻿ / ﻿57.69000°N 5.48583°W﻿ / 57.69000; -5.48583 | Two islets, each of which is 15m by 15m |
| — | — | — | Kooryet Lake | Banks Island (British Columbia) | Canada | ~100 | 53°21′7″N 129°59′30″W﻿ / ﻿53.35194°N 129.99167°W﻿ / 53.35194; -129.99167 | A number of small islets, the largest of which is only 10m across |
| — | — | Samosir | Lake Toba | Sumatra | Indonesia | 400 | 2°38′11″N 98°50′14″E﻿ / ﻿2.63639°N 98.83722°E﻿ / 2.63639; 98.83722 |
| — | — | Ostrov Litvinova | Ozero Nevskoye | Sakhalin | Russia | 50 | 49°19′17″N 143°37′30″E﻿ / ﻿49.32139°N 143.62500°E﻿ / 49.32139; 143.62500 | There is (at least) one smaller island in the same lake |
| — | — | — | Jubilee Lake | Newfoundland | Canada | 20 | 48°3′50″N 55°10′24″W﻿ / ﻿48.06389°N 55.17333°W﻿ / 48.06389; -55.17333 | Several small islets, the largest of which is about 5 m across |
| — | — | Cayo pajaro | Laguna de Leche | Cuba | Cuba | 832 | 22°13′31″N 78°40′2″W﻿ / ﻿22.22528°N 78.66722°W﻿ / 22.22528; -78.66722 | There are several other islets in the lake, all about half the area of the specified islet. |
| Vulcan Point | Main Crater Lake | Volcano Island | Lake Taal | Luzon | Philippines | | 14°00′35″N 120°59′54″E﻿ / ﻿14.00972°N 120.99833°E﻿ / 14.00972; 120.99833 | |
| — | — | — | Hatchet Lake | Adak Island | United States | | 51°43'49.1"N 176°45'31.2"W | |

## Islands in lakes on islands in lakes on islands in lakes

5th Grade recursion is very rare, only one has been confirmed with photos as of its existence and mapping to go along with it.
| Name | In lake | On island | In lake | On island | In lake | Country | Size (km$^2$) | Coordinates | Notes |
| Hopeful Island | Receive Lake | Undo Island | Lander Lake | Bruising Sand Land | Yathkyed Lake | Canada | | 62°39'04"N 97°47'11"W | Most names of tiny islands and lakes are nicknames and therefore are not real names because they are not named yet. Not much information on it's size but it has been seen as a "secret" tourist sight, as long as they hike correctly. Red means no page yet, try to make one for something! |
Moose Boulder was claimed to exist in the seasonal pond of Moose Flats on Ryan Island in Siskiwit Lake on Isle Royale in Lake Superior in the United States. In 2020, an expedition to the island found that it is potentially a hoax, along with the aforementioned seasonal pond.

## Recursive lakes
### Lakes on islands

| Name | On island | Country | Size (km$^2$) | Coordinates | Notes |
| Nettilling Lake | Baffin Island | Canada | 5,542 | 66°29′N 70°20′W | |
| Lake Alaotra | Madagascar | Madagascar | 900 | 17.5°S 48.5°E | |
| Laguna de Leche | Cuba | Cuba | 67.2 | 22°12′33″N 78°37′17″W﻿ / ﻿22.20917°N 78.62139°W﻿ / 22.20917; -78.62139 | |
| Lough Neagh | Island of Ireland | Northern Ireland/United Kingdom | 392 | 54°37′06″N 6°23′43″W﻿ / ﻿54.61833°N 6.39528°W﻿ / 54.61833; -6.39528 | |
| Lough Corrib | Island of Ireland | Republic of Ireland | 176 | 53°26′N 9°14′W | |
| Loch Lomond | Great Britain | Scotland/United Kingdom | 71 | 56°05′N 4°34′W | |
| Lake Kawaguchi | Honshu | Japan | 6.13 | 35°30′56″N 138°45′36″E﻿ / ﻿35.51556°N 138.76000°E﻿ / 35.51556; 138.76000 | The largest among the Fuji Five Lakes |
| Þingvallavatn | Iceland | Iceland | 84 | 64°11′N 21°09′W | |
| Lake Taupō | North Island | New Zealand | 616 | 38°48′25″S 175°54′28″E﻿ / ﻿38.80694°S 175.90778°E﻿ / -38.80694; 175.90778 | |
| Lake Wakatipu | South Island | New Zealand | 289 | 45°03′S 168°30′E﻿ / ﻿45.050°S 168.500°E﻿ / -45.050; 168.500 | |
| Lake Biwa | Honshu | Japan | 670 | 35°20′N 136°10′E | Largest lake in Japan |
| Lake Toba | Sumatra | Indonesia | 1130 | 2°40′48″N 98°52′48″W﻿ / ﻿2.68000°N 98.88000°W﻿ / 2.68000; -98.88000 | |
| Lake Ranau | Sumatra | Indonesia | 126 | 4°51′45″S 103°55′50″E﻿ / ﻿4.86250°S 103.93056°E﻿ / -4.86250; 103.93056 | |
| Lake Singkarak | Sumatra | Indonesia | 108 | 0°37′12″S 100°32′24″E﻿ / ﻿0.62000°S 100.54000°E﻿ / -0.62000; 100.54000 | |
| Lake Towuti | Sulawesi | Indonesia | 561 | 2°45′0″S 121°30′0″E﻿ / ﻿2.75000°S 121.50000°E﻿ / -2.75000; 121.50000 | |
| Lake Poso | Sulawesi | Indonesia | 323 | 1°55′28″S 120°37′0″E﻿ / ﻿1.92444°S 120.61667°E﻿ / -1.92444; 120.61667 | |
| Lake Matano | Sulawesi | Indonesia | 164 | 2°29′7″S 121°20′0″E﻿ / ﻿2.48528°S 121.33333°E﻿ / -2.48528; 121.33333 | |

### Lakes on islands in lakes

| Name | On island | In lake | Country | Size (km$^2$) | Coordinates | Notes |
| Lake Manitou | Manitoulin Island | Lake Michigan–Huron | Canada | 106 | 45°46′42″N 81°59′30″W﻿ / ﻿45.77833°N 81.99167°W﻿ / 45.77833; -81.99167 |
| Lac Observation | René-Levasseur Island | Manicouagan Reservoir | Canada | 13.5 | 51°21′42″N 68°49′12″W﻿ / ﻿51.36167°N 68.82000°W﻿ / 51.36167; -68.82000 | |
| Ylä-Enonvesi | Sääminginsalo | Saimaa | Finland | 12 | 62°3′7″N 29°0′12″E﻿ / ﻿62.05194°N 29.00333°E﻿ / 62.05194; 29.00333 | Includes Lake Saarijärvi that forms its southern part. Separated by an artificial canal, Sääminginsalo might not be considered an island. |
| Kulkemus | Partalansaari | Pihlajavesi (Saimaa) | Finland | 5.8 | 61°40′43″N 28°24′13″E﻿ / ﻿61.67861°N 28.40361°E﻿ / 61.67861; 28.40361 | |
| Saajuu-Palovesi | Partalansaari | Pihlajavesi (Saimaa) | Finland | 4.1 | 61°41′55″N 28°19′34″E﻿ / ﻿61.69861°N 28.32611°E﻿ / 61.69861; 28.32611 | |
| Saravesi | Kotasaari | Kallavesi | Finland | 4.1 | 62°50′49″N 28°4′52″E﻿ / ﻿62.84694°N 28.08111°E﻿ / 62.84694; 28.08111 | Separated by an artificial canal, Kotasaari might not be considered an island. |
| Oininki | Äitsaari | Saimaa | Finland | 2.6 | 61°18′52″N 28°38′21″E﻿ / ﻿61.31444°N 28.63917°E﻿ / 61.31444; 28.63917 | |
| Malosenjärvi | Viljakansaari | Pihlajavesi (Saimaa) | Finland | 1.4 | 61°31′58″N 28°16′11″E﻿ / ﻿61.53278°N 28.26972°E﻿ / 61.53278; 28.26972 | |
| Valkiajärvi | Hurissalo | Saimaa | Finland | 1.4 | 61°30′27″N 27°49′29″E﻿ / ﻿61.50750°N 27.82472°E﻿ / 61.50750; 27.82472 | |
| Ruokojärvi | Partalansaari | Pihlajavesi (Saimaa) | Finland | 1.3 | 61°38′1″N 28°23′39″E﻿ / ﻿61.63361°N 28.39417°E﻿ / 61.63361; 28.39417 | |
| Närtejärvi | Viljakansaari | Pihlajavesi (Saimaa) | Finland | 1.2 | 61°34′31″N 28°31′8″E﻿ / ﻿61.57528°N 28.51889°E﻿ / 61.57528; 28.51889 | |
| Kylliönjärvi | Viljakansaari | Pihlajavesi (Saimaa) | Finland | 1.1 | 61°33′47″N 28°22′59″E﻿ / ﻿61.56306°N 28.38306°E﻿ / 61.56306; 28.38306 | |
| Lapinjärvi | Hurissalo | Saimaa | Finland | 1.1 | 61°29′33″N 27°48′30″E﻿ / ﻿61.49250°N 27.80833°E﻿ / 61.49250; 27.80833 | |
| Shara-Nur | Olkhon Island | Lake Baikal | Russia | | 53°06′18″N 107°15′16″E﻿ / ﻿53.10500°N 107.25444°E﻿ / 53.10500; 107.25444 | |
| Siskiwit Lake | Isle Royale | Lake Superior | United States | 16.8 | 48°00′05″N 088°47′50″W﻿ / ﻿48.00139°N 88.79722°W﻿ / 48.00139; -88.79722 | |
| Lake Desor | Isle Royale | Lake Superior | United States | | 47°58′36″N 88°59′13″W﻿ / ﻿47.97667°N 88.98694°W﻿ / 47.97667; -88.98694 | |
| Lake Richie | Isle Royale | Lake Superior | United States | | 48°2′38″N 88°41′43″W﻿ / ﻿48.04389°N 88.69528°W﻿ / 48.04389; -88.69528 | |
| Lake Mindemoya | Manitoulin Island | Lake Michigan–Huron | Canada | 38.7 | 45°45′43″N 82°12′32″W﻿ / ﻿45.76194°N 82.20889°W﻿ / 45.76194; -82.20889 | |
| Lake Kagawong | Manitoulin Island | Lake Michigan–Huron | Canada | 55.6 | 45°50′0″N 82°18′36″W﻿ / ﻿45.83333°N 82.31000°W﻿ / 45.83333; -82.31000 | |
| Little Lake | Washington Island | Lake Michigan | United States | 0.17 | 45°24′36″N 86°56′29″W﻿ / ﻿45.41000°N 86.94139°W﻿ / 45.41000; -86.94139 | |
| Lake Windigo | Star Island | Cass Lake (Minnesota) | United States | 0.8 | 47°25′7″N 94°34′13″W﻿ / ﻿47.41861°N 94.57028°W﻿ / 47.41861; -94.57028 | |
| Fox Lagoon | Pelee island | Lake Erie | Canada | 0.02 | 41°43′57″N 82°40′18″W﻿ / ﻿41.73250°N 82.67167°W﻿ / 41.73250; -82.67167 | |
| Lake Henry | Pelee island | Lake Erie | Canada | 0.345 | 41°49′32″N 82°38′20″W﻿ / ﻿41.82556°N 82.63889°W﻿ / 41.82556; -82.63889 | |
| Laguna del Volcan Maderas | Ometepe | Lake Nicaragua | Nicaragua | 0.034 | 11°26′42″N 85°30′38″W﻿ / ﻿11.44500°N 85.51056°W﻿ / 11.44500; -85.51056 | |
| Laguna de Zapatera | Zapatera | Lake Nicaragua | Nicaragua | 0.19 | 11°45′59″N 85°51′25″W﻿ / ﻿11.76639°N 85.85694°W﻿ / 11.76639; -85.85694 | |
| Antoniyevskoye Lake | Valaam | Lake Ladoga | Russia | 0.028 | 61°23′18″N 30°59′48″E﻿ / ﻿61.38833°N 30.99667°E﻿ / 61.38833; 30.99667 | |
| Ozero Leshchevo | Valaam | Lake Ladoga | Russia | 0.27 | 61°21′35″N 30°55′58″E﻿ / ﻿61.35972°N 30.93278°E﻿ / 61.35972; 30.93278 | |
| Lake Geneserath | Beaver Island | Lake Michigan–Huron | United States | 2 | 45°35′55″N 85°32′23″W﻿ / ﻿45.59861°N 85.53972°W﻿ / 45.59861; -85.53972 | |
| Ösjön | Ammerön | Revsundssjön | Sweden | 0.58 | 62°51′53″N 15°10′21″E﻿ / ﻿62.86472°N 15.17250°E﻿ / 62.86472; 15.17250 | |
| Igelviken | Färingsö | Mälaren | Sweden | 0.47 | 59°21′53″N 17°42′13″E﻿ / ﻿59.36472°N 17.70361°E﻿ / 59.36472; 17.70361 | |
| Ändsjön | Frösön | Storsjön | Sweden | 0.32 | 63°10′34″N 14°34′24″E﻿ / ﻿63.17611°N 14.57333°E﻿ / 63.17611; 14.57333 | |
| Gråtjønna | Røssvassholmen | Røssvatnet | Norway | 0.05 | 65°41′46″N 13°59′47″E﻿ / ﻿65.69611°N 13.99639°E﻿ / 65.69611; 13.99639 | |
| — | — | Lake Chad | Cameroon | | | There is another, smaller lake on that island. There are a few more islands in Lake Chad that have a lake on them. |
| Süvähaud | Piirissaar | Peipus | Estonia | | | |
| — | — | Thac Ba Reservoir | Vietnam | 0.05 | 21°50'24.7"N 104°58'02.5"E | There are some extremely tiny islets in that lake. |

### Lakes on islands in lakes on islands

| Name | On island | In lake | On island | Country | Size (km$^2$) | Coordinates | Notes |
| — | — | Nettilling Lake | Baffin Island | Canada | 1.55 | 66°23′15″N 69°38′41″W﻿ / ﻿66.38750°N 69.64472°W﻿ / 66.38750; -69.64472 | |
| — | Glover Island | Grand Lake | Newfoundland | Canada | 1.40 | 48°48′9″N 57°39′41″W﻿ / ﻿48.80250°N 57.66139°W﻿ / 48.80250; -57.66139 | |
| Arethusa Pool | Mou Waho | Lake Wānaka | South Island | New Zealand | 0.05 | 44°33′15″S 169°05′00″E﻿ / ﻿44.55417°S 169.08333°E﻿ / -44.55417; 169.08333 |
| — | Rahui Island | Lake Waikareiti | North Island | New Zealand | 0.003 | 38°42′45″S 177°10′22″E﻿ / ﻿38.71250°S 177.17278°E﻿ / -38.71250; 177.17278 |
| — | — | Jubilee Lake | Newfoundland | Canada | 0.025 | 48°3′50″N 55°10′24″W﻿ / ﻿48.06389°N 55.17333°W﻿ / 48.06389; -55.17333 |
| — | — | Mölnorträsk | Fårö | Sweden | 0.00006 | 57°55′45″N 19°08′29″E﻿ / ﻿57.92917°N 19.14139°E﻿ / 57.92917; 19.14139 | Extremely small |
| — | — | — | Baffin Island | Canada | | 70°41′14″N 80°34′18″W﻿ / ﻿70.68722°N 80.57167°W﻿ / 70.68722; -80.57167 |
| Molemole | Motu'a'ali | Motu Si'i | Niuafo'ou | Tonga | 0.02 | 15°35′42″S 175°38′57″W﻿ / ﻿15.594888°S 175.649157°W﻿ / -15.594888; -175.649157 | |
| — | Sandey | Þingvallavatn | Iceland | Iceland | | | |
| — | Gatter Lake | Lake Hazen | Ellesmere Island | Canada | | | Northernmost lake of its kind in the world. |
| — | Teinholmen | Vestrevatnet | Osterøy | Norway | | 60°32′12″N 5°37′38″E﻿ / ﻿60.536628°N 5.627209°E﻿ / 60.536628; 5.627209 | |

### Lakes on islands in lakes on islands in lakes

4th grade recursion lakes are incredibly rare. There have been only 3 found right now, with newest one discovered on 3/15/25 (M/D/Y) .
| Name | On island | In lake | On island | In lake | Country | Size (km$^2$) | Coordinates | Notes |
| Receive Lake | Undo Island | Lander Lake | Bruising Sand land | Lake Yathkyed | Canada | 0.013 | 62°39′5.8″N 97°47′11.8″W﻿ / ﻿62.651611°N 97.786611°W﻿ / 62.651611; -97.786611 | There is, even further, an island in that lake, making it the only such island in the world that has been discovered. Island names are not confirmed but are nicknames. |
| The Winking Lake | — | — | — | Réservoir Laforge 1 | Canada | 0.00006 | 54.30360° N, 71.94712° W | May have an island in the center, due to small size, requires in real life check. The lake itself is only visible in a few maps. |
| Mother Michelle's Lake | Enzo's Isle | Lake Unicorn | Glove Island of the Simpson Islands | Great Slave Lake | Canada | 0.0004 | 61°41'35"N 112°45'27"W | May have an island close to edges. Lake found by son and mother on mapcarta and google earth, so fittingly named Mother's Michelle's Lake named after the mother. Discovered 3/15/25 (M/D/Y) . Although the lake and Enzo's Isle have websites, maybe make a wiki page for them and maybe others to contribute! |