Boston Harbor Islands National and State Park is a combination national recreation area and state park situated among the islands of Boston Harbor. The park is made up of 34 islands and peninsulas and is managed by the Boston Harbor Islands Partnership.
Twenty-one of the islands are also included in the Boston Harbor Islands Archeological District. The park is significant for a wide range of natural and cultural resources, including three national historic landmarks, unique geological features, archaeological resources resulting from thousands of years of occupation of the islands by indigenous people of Massachusetts, and complex natural communities.