Ulster Football Club is a defunct Irish association football club that was based in Ballynafeigh, Belfast. It was initially founded in 1877 as a rugby club, but later switched codes to association football. It was subsequently a founding member of the Irish Football League in 1890. The club later switched back to rugby and continued playing into the 1930s.The club was founded by members of Ulster Cricket Club and played its home games at the Ulster Cricket Ground.