| Linnansaari National Park | |
| Iucn Category: | II |
| Map: | Finland |
| Relief: | 1 |
| Location: | Finland |
| Coordinates: | 62.1106°N 28.5094°W |
| Area Km2: | 38 |
| Established: | 1956 |
| Visitation Num: | 31000 |
| Visitation Year: | 2009[1] |
| Governing Body: | Metsähallitus |
Linnansaari National Park (Finnish: Linnansaaren kansallispuisto) is a national park in the Southern Savonia and Northern Savonia regions of Finland. It lies in the middle of the lake Haukivesi, a part of greater Saimaa. The National Park was established to conserve the valuable natural features of the Finnish lakeland.
On the main island there's an old croft. Slash-and-burn agriculture is still practised on its fields to conserve the old cultural landscape and the associated plant and animal species. A large part of the island is natural-state coniferous forest, with some herb-rich parts.
The critically endangered Saimaa Ringed Seal inhabits the park.