| Warren Island State Park | |
| Iucn Category: | III |
| Iucn Ref: | [1] |
| Map: | USA Maine |
| Map Size: | 280 |
| Relief: | 1 |
| Location: | Islesboro, Maine, United States |
| Coordinates: | 44.2725°N -68.9453°W |
| Area Acre: | 70 |
| Elevation: | 52feet |
| Established: | 1959 |
| Administrator: | Maine Department of Agriculture, Conservation and Forestry |
| Website: | Warren Island State Park |
| Embedded: | Maine State Parks |
Warren Island State Park is state-owned island and public recreation area on Penobscot Bay in the town of Islesboro, Waldo County, Maine, United States. The 70acres state park sits about ½-mile from Islesboro Island and offshore from the mainland at Lincolnville. The island was acquired by the state of Maine for one dollar in 1959. Hiking trails, campsites, and open-faced shelters are found on the island; a pier allows access by private boat.