Linfield F.C. (the Blues) are a Northern Irish football team, founded in March 1886 in south Belfast, who play at Windsor Park, the 'home' of the Northern Ireland international team.

The governing body of Northern Ireland football, the Irish Football Association, leases the ground for use by the national team. The club, which has the biggest fan base in Northern Ireland, has a playing record unsurpassed in Irish soccer, winning the Premiership title 45 times, and the Irish F.A. Cup 36 times. It has won 17 domestic doubles as of 2004, tying them with Scottish power Rangers on the top of the all-time world list.