Keenaght (from Irish Cianachta 'race of Cian') is a barony in the mid-northerly third of County Londonderry, Northern Ireland. It connects to the north-Londonderry coastline, and is bordered by four other baronies: Coleraine to the east; Loughinsholin to the south-east; Tirkeeran to the west; and Strabane Upper to the south-west. It was the territory of the Cianachta Glengiven from the 5th century until its takeover in the 12th century by the Ó Cathaín's. The largest settlement in the barony is the town of Limavady.