Monaghan United F.C. () 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. History League of Ireland Monaghan United were founded in 1979. Among the club's founding members was Sean McCaffrey who was also the manager of the club when they joined the League of Ireland B Division in 1983–84. In 1985–86 Monaghan United became founder members of the League of Ireland First Division. United played eight seasons in the First Division before winning their first promotion. After finishing third in 1992–93 they became the first League of Ireland club to gain promotion via a promotion/relegation play off. They defeated Waterford United 5–2 on aggregate and were subsequently promoted to the 1993–94 Premier Division. They survived just two seasons in the Premier Division before being relegated at the end of the 1994–95 season. Monaghan United gained promotion to the Premier Division for a second time in 2000–01 after finishing second to Dundalk. This time their stay in the Premier Division last just one season. After managing to win just two league games, they finished last and were relegated following the conclusion of the 2001–02 season. Monaghan United reached the final of the 2010 League of Ireland Cup but lost 1–0 in the final to Sligo Rovers. They also finished third in the 2010 First Division and qualified for the promotion/relegation play off. They subsequently beat Waterford United before losing to Bray Wanderers on penalties. In 2011, under the management of Roddy Collins, Monaghan United again qualified for the promotion/relegation play off. This time they won promotion after beating Galway United 5–1 on aggregate. However, midway through the 2012 season,