Kildare, market town, County Kildare, Ireland. The Protestant cathedral church (1229) is dedicated to St. Brigit of Ireland, who founded a community there in the 5th century. Restoration of the church was begun in 1875. Near the church are an ancient cross and round tower, and there are remains of a 13th-century castle and monastery. The town was incorporated by James II. Pop. (2006) 7,538; (2011) 8,142.