Monaghan United F.C. (Irish: Cumann Peile Mhuineacháin Aontaithe) is an Irish association football club based in Monaghan currently playing in the Ulster Senior League. The club joined the League of Ireland in 1983 and subsequently went on to play in the B Division, the First Division and the Premier Division. They resigned from the league midway through the 2012 season. The club continued to field a women's team in the Dublin Women's Soccer League and, together with the Cavan Monaghan Underage League, they entered a combined team in the League of Ireland U13 Division, League of Ireland U15, U17 and the U19 League of Ireland Divisions, until 2020, whereupon the partnership was ended, the CMUL continued to field a team in the national underage leagues. In 2019 the club entered a senior team into the Monaghan Cavan League, and in 2021, the club joined the Ulster Senior League.