Coolhull Castle is a late 16th century[2] fortified house and National Monument located in County Wexford, Ireland.

[3][2] Coolhull Castle is located in south County Wexford near Bannow Bay, 4.6 km (2.9 mi) southeast of Wellingtonbridge.

Coolhull Castle has a four-storey service tower and three-storey rectangular block (hall house) attached with a hall at first-floor level.

The tower doorway is protected by a murder-hole.

Other features include fireplaces, garderobe and slop stone.