The Boston Harbor Islands State Park is a state park and recreation area in Boston, Massachusetts. It is a collection of 13 islands located on the Boston Harbor.

Also a part of the Boston Harbor Islands National Recreation area, the Boston Harbor Islands State Park was founded in the 1970s by the Massachusetts Department of Environmental Management or DEM. The national recreation area was created in 1996.

Composed of the Slate, Calf, Bumpkin, Gallops, Sheep, Grape, Raccoon, Middle Brewster, Outer Brewster, Great Brewster, Green, Hangman, Little Calf, and Middle Brewster Islands, the Boston Harbor Islands State Park offers unique cultural and natural history. It is also packed with tons of recreational opportunities like boating, swimming, fishing, canoeing, island camping, picnicking, and hiking.