The Lily Bay State Park is a state park and recreation area in Greenville, Maine. It is best known for its campsites.

The thing about the Lily Bay State Park is that they have waterfront camping. This makes the site an ideal place to go spending your night among the stars attractive to many. For more, the park is home to Moosehead Lake, which is the largest lake in all of New England measuring 117 square miles. It also features several points of interests including the 427-acre Prong Pond surrounded by small mountains, Mt. Kineo, Big Moose Mountain, Lazy Tom Bog that is famous for moose- watching, Big Spencer Mountain, and Number 4 Mountain.

The Lily Bay State Park is also visited to enjoy canoeing, boating, bird watching, fishing, cross country skiing, fishing, picnicking, swimming, snowmobiling, snowshoeing, and hiking.