Barntown (Irish: Baile an Bharúnaigh) is a townland and village in County Wexford, Ireland. Located just outside the boundary of Wexford town, as of the 2016 census, Barntown had a population of 459 people. The remains of Barntown Castle, a Norman tower house, lie to the east of the village of Barntown. This was built by the Roche family, and was used as a watchtower and storehouse for . St Alphonsus Church is the main church of the parish. It was designed by Augustus Welby Pugin, and built in 1848 by the Very Rev Patrick Murphy.