NOTE: Australia is widely considered as a continental landmass, not an island. It certainly is the largest island, with a size of (2,941,517 sq miles) (7,618,493 sq km). 1  Indonesia - (735,358 sq miles) (1,904,569 sq km)  Madagascar - (226,917 sq miles) (587,713 sq km)
http://www.worldatlas.com/aatlas/infopage/islands.htm
NOTE: Australia is widely considered as a continental landmass, not an island. It certainly is the largest island, with a size of (2,941,517 sq miles) (7,618,493 sq km). 1  Indonesia - (735,358 sq miles) (1,904,569 sq km) 2  Madagascar - (226,917 sq miles) (587,713 sq km)  Papua New Guinea - (178,704 sq miles) (462,840 sq km)
http://www.worldatlas.com/aatlas/infopage/islands.htm
In one of them is an island surrounding a smaller lake, and in that smaller lake, at exactly 69.793° N, 108.241° W, sits a narrow island about a fifth of a mile long. Yes, this nameless, four-acre island is the world’s largest island-in-a-lake-on-an-island-in-a-lake-on-an-island.
http://www.cntraveler.com/stories/2012-01-24/victoria-british-columbia-nunavut-unnamed-island-maphead-ken-jennings
Note: Vozrozhdeniya, an island in the Aral Sea between Uzbekistan and Kazakhstan, had been the second largest lake island, at about 900 sq miles / 2,300 sq km, but the shrinking of the sea joined it to the mainland between June 2000 and June 2001.  It is now a peninsula. See also Largest Islands of the Great Lakes. Return to main World Island Info menu. Last modified 9/10/05--------------------------- Copyright 2006 Joshua Calder. Contact Joshua Calder at jcalder@erols.com with questions or suggestions.
http://www.worldislandinfo.com/LAKEV1.htm
The world’s largest island within an island within an island is located on the Nunavut side of Victoria Island, which was named after Queen Victoria. It has a peninsula named after her consort, Prince Albert, and the Tunnunik impact crater was once called the Prince Albert impact crater.
http://www.dailymail.co.uk/travel/travel_news/article-3509321/Victoria-Island-Canada-world-s-largest-island-lake-island-lake-island.html
Revealed: The world's largest island in a lake on an island in a lake on an island (and it's probably never had a human visitor) Measuring about four acres, the unnamed islet is in the Canadian Arctic.
http://www.dailymail.co.uk/travel/travel_news/article-3509321/Victoria-Island-Canada-world-s-largest-island-lake-island-lake-island.html
Canada is also home to the world’s largest island-in-a-lake (Manitoulin Island in Lake Huron) and the world’s largest lake-on-an-island (Nettilling Lake on Baffin Island). The world’s largest island-in-a-lake-on-an-island, however, is the volcanic island of Samosir, in the middle of Sumatra’s Lake Toba. The deep-blue tropical waters and Batak culture of Lake Toba make it a much more popular tourist destination than the icy Canadian lake.
http://www.cntraveler.com/stories/2012-01-24/victoria-british-columbia-nunavut-unnamed-island-maphead-ken-jennings
Revealed: The world's largest island in a lake on an island in a lake on an island (and it's probably never had a human visitor) It’s said to be the world’s largest island within an island within an island – but it has probably never been visited by a human. Measuring about four acres, this unnamed islet in the Arctic is set within a small lake which is on a slightly larger island within a bigger lake on Canada’s enormous Victoria Island.
http://www.dailymail.co.uk/travel/travel_news/article-3509321/Victoria-Island-Canada-world-s-largest-island-lake-island-lake-island.html
Jeopardy champ Ken Jennings finds oddities every week in his Maphead column. This time, he finds the world's largest island in a lake on an island in a lake on an island—in Canada.
http://www.cntraveler.com/stories/2012-01-24/victoria-british-columbia-nunavut-unnamed-island-maphead-ken-jennings
Revealed: The world's largest island in a lake on an island in a lake on an island (and it's probably never had a human visitor) 1  Measuring about four acres, the unnamed islet is in the Canadian Arctic.  It is an island within an island within sparsely populated Victoria Island.
http://www.dailymail.co.uk/travel/travel_news/article-3509321/Victoria-Island-Canada-world-s-largest-island-lake-island-lake-island.html
largest lake on an island
Te largest lake on an island is lake Huron. Lake Huron is the largest lake on an island.