Trillick (from Irish Trileac, meaning 'three flagstones')[2] is a small village in County Tyrone, Northern Ireland.

Records show that the Celts had a major base here and, on being converted to Christianity, had established an Abbey at Trelic Mor by 613 A.D.

They fought the famous battle of Dreigh Hill in 1379 against the Maguires and won a victory which settled the Tyrone/Fermanagh county boundary here.

The Civil Survey of 1654 says that the remains of a village, church, burial ground and mill could still be seen at Old Trelic but, by then, the new town of Trillick had been built.

After the Flight of the Earls from Lough Swilly on 4 September 1607, and the division of their escheated lands, the O’Neill territory here was given the description of the Manor of Stowy and allotted to Sir Mervyn Tuchet in 1611 during the Plantation of Ulster.

Being on the direct route from Dublin to Derry and within striking distance of the strong Enniskilling base at Enniskillen, Trillick became an important post during the Jacobite wars.

After lifting the siege of Derry, King William's army billeted at Trillick on its way back to Enniskillen in August 1689.