The club was established as Irchester Excelsior in 1883, before being renamed Irchester United in 1885. They joined Division Two of the
Northamptonshire League in 1896, but finished bottom of the division in the 1896–97 season and left the league. In 1928–29 the club won the Rushden & District League. Returning to the Rushden & District League, which their reserves had won in 1932–33 and 1933–34 Irchester won the league in 1936–37. In 1980 the club was renamed Irchester Eastfield after a merger with Wellingborough Eastfield due to a shortage of players. However, they reverted to Irchester United in 1990. The next two decades were a period of struggle as the club ended the season in last place in Division One in 1990–91, 1991–92, 1995–96 and 1999–2000. Although the 2002–03 season saw a third-place finish, they finished bottom of the table in three successive seasons between 2006–07 and 2008–09. However, the following season, 2009–10, the club won the Division One title, earning promotion to the Premier Division. Following three seasons in the Premier Division, Irchester were relegated back to Division One after finishing bottom of the division in
2012–13. At the end of the
2020–21 season they were transferred to Division One of the
Spartan South Midlands League. In
2024–25 the club finished fourth in Division One, qualifying for the promotion play-offs, in which they lost on penalties to
Moulton at the semi-final stage. ==Ground==