Brookeborough (. Irish: Achadh Lon) is a village in County Fermanagh, Northern Ireland. It lies about eleven miles east of Enniskillen, just off the A4 trunk road, and about five miles west of the County Tyrone boundary.
According to the 2001 Census, Brookeborough had a population of 517. The economy is heavily dependent on cattle and sheep farming. The village is in the parish of Aghavea, which is part of the Diocese of Clogher. There are five places of Christian worship; a Catholic church, a Methodist church (built in 1839), an Elim Pentecostal church, a Church of Ireland church and a Baptist church; three public houses; and two primary (elementary) schools.
The Boer War memorial at the head of the town was carved by a local man named Harte in 1901. Behind it is the Lady Brooke Memorial Hall of the same date, a period building preserving all its original features including a clocktower and transverse stained glass window panels.
Before the Plantation of Ulster the area of Brookeborough was known as Achadh Lon (anglicised as Aghalun), the townland in which it lies. It is believed that the Irish name refers to a "field of blackbirds". Aghalun was in the hands of the Maguire Clan until the 1641 rebellion when it was given to the Brooke family. The village was then named after Sir Henry Brooke, who was granted the village in 1666 and settled at Colebrooke Park nearby.
On 1 January 1957, there was a well-known attack on Brookeborough R.U.C. Barracks by the I.R.A. during its 1950s Border Campaign. This attack was led by Seán Garland, and included Seán South and Fergal O'Hanlon, both the subjects of well-known Irish republican ballads, who were shot dead during the attack.
In 2002, the Brookeborough Community Development Association, in conjunction with a similar organisation in Riverstown, County Sligo, Republic of Ireland, launched the Riverbrooke Cross-Border Initiative linking the two villages in a programme of cross-community/cross-border working.