The New Jersey State League of Municipalities is a voluntary association created by a New Jersey statute in 1915 to serve municipalities and local officials in the U.S. state of New Jersey. All 565 of New Jersey's municipalities are members of the League and all elected and appointed officials of member municipalities are entitled to the League's services. The organization is headquartered in the state capital of Trenton. The organization awards 10 years and 20 year service awards to New Jersey mayors as part of their Mayors Hall of Fame.