| Selaön | |
| Island | |
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Överselö Church on Selaön
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| Country | Sweden |
|---|---|
| County | Södermanland |
| Municipality | Strängnäs |
| Location | Mälaren |
| - coordinates | |
| Area | 94.72 km2 (37 sq mi) [1] |
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Selaön is the largest island in Mälaren, Sweden, and covers 91 km². It is located at Stallarholmen, east of Strängnäs, and it has about 3,000 permanent residents. It is connected by a bridge to the mainland. It is the largest island in any lake in Sweden.
In the Heimskringla, Granmar, the king of Södermanland, was murdered on this island by Ingjald Illruler.