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.^[1] The organization is headquartered in the state capital of Trenton.

The league's Annual Conference, held each November in Atlantic City allows delegates the opportunity to participate in more than 100 panels, clinics, workshops, and other sessions. The 2004 Conference was attended by over 21,000 individuals, making it the largest municipal gathering in the country.^[1]

The organization grants 10 years, 20 years and 30 year service awards to New Jersey mayors as part of their Mayors Hall of Fame. In 1999, an award for the Elected Officials Hall of Fame was initiated.^[2]