Dromore Castle, Tower house and national monument in County Clare, Ireland.

Dromore Castle is a four-storey tower house on a peninsula in the northern part of Dromore Lake, within Dromore Wood Nature Reserve. A vault covers the ground floor; a wide circular staircase rises to the right of the main door, with a small guardroom to the left. The roof has a chemin de ronde around the gables and a rectangular chimney with twin lozenge-shaped flues.

Dromore Castle was probably built in the early 16th century. In 1579 the castle and lands of Dromore were granted to Connor O'Brien, third Earl of Thomond; in the 17th century his son Teige repaired and expanded the tower, and an inscription over the door names Teige and his wife Slany Brien as builders. Teige's son Dermot fought in the Confederate Wars and took part in the Siege of Ballyalla Castle. The last O'Brien, Conor, left in 1689, and the castle fell into ruin in the 18th century.

The name Dromore comes from the Irish Droim Mór, "great ridge". The doorway inscription names Teige O'Brien, second son of Connor, third Earl of Thomond, and his wife Slany Brien as builders, with the date left illegible. The castle stands in the townland of Dromore, between Crusheen and Corofin, west of the M18 and north of Ennis.

The castle sits within a nature reserve between the villages of Crusheen and Corofin and is managed by the National Parks and Wildlife Service. Access is on foot via paths through woodland, so sturdy shoes and readiness for outdoor weather are helpful for a visit.

The doorway inscription names Teige O'Brien, second son of Connor, third Earl of Thomond, and his wife Slany Brien as builders, but the date after "Anno" is illegible. The roof keeps a chemin de ronde around the gables and a chimney with twin lozenge-shaped flues.