Moon Island is an island in Quincy Bay, in the middle of Boston Harbor, Massachusetts. It is the location of the Boston Fire Department Training Academy, and Boston Police Department shooting range. All of the land on the island is owned by the City of Boston but the island is under the jurisdiction of Quincy, Massachusetts. It is also part of the Boston Harbor Islands National Recreation Area.

Quincy is a coastal U.S. city in Norfolk County, Massachusetts, United States. It is the largest city in the county and a part of Metropolitan Boston as one of Boston's immediate southern suburbs. Its population in 2020 was 101,636, making it the seventh-largest city in the state. Known as the "City of Presidents", Quincy is the birthplace of two U.S. presidents—John Adams and his son John Quincy Adams—as well as John Hancock, the first signer of the Declaration of Independence and the first and third governor of Massachusetts.