Crossmaglen or Crosmaglen is a village and townland in south County Armagh, Northern Ireland. It had a population of 1,459 people in the 2001 Census and is the largest village in south Armagh. The village centre is the site of a large Police Service of Northern Ireland base and formerly of an observation tower (known locally as the "look-out post").
The square's name commemorates Cardinal Tomás Ó Fiaich, a local man who became Primate of All Ireland (head of the Roman Catholic Church in Ireland), and who died in 1990. Crossmaglen also gives its name to a famous GAA team.