Ballyhack (Irish: Baile Hac or Baile Each)[2][3] is a small village located in the south-west of County Wexford, in Ireland, on the eastern shore of the Waterford Harbour, which is the estuary of The Three Sisters The village contains a 15th-century Norman castle or tower house, which belonged to the Knights Hospitallers and was built around 1480,[4] though it is thought the site's use was initially as a Preceptory, as far back as the 12th-century.

[5] The castle was occupied by Cromwellian forces during the Irish Rebellion of 1641, and was later used as a transportation point for those displaced by the Act for the Settlement of Ireland 1652.

[3] The castle is open to the public, having been partially restored, and displays objects relating to the Crusades, the Normans, and medieval monks.

The derivation is believed to be from the Irish word for stable, seasmhach, and baile meaning town, village, home or settlement.

[citation needed] The local Gaelic Athletic Association club is St James GAA, which plays in the Intermediate grade of the Wexford Championship.