Garbally Castle, Medieval tower house in County Galway, Ireland

Garbally Castle is a ruined three-storey tower house built around a square plan, with its interiors exposed. The southwest side is the most damaged, showing thick side walls with mural passages and a vaulted ceiling on the first floor. A pointed arch doorway on the southeastern wall is overlooked by a gun loop in the south jamb and a murder-hole, while the northeast and southeast parapets retain corbels that supported machicolations.

Malachy O'Kelly constructed this fortified structure in 1499 as a stronghold for his clan. The castle was destroyed by MacWilliam De Burgo in 1504, marking the end of its use as a working fortress.

Garbally is the anglicised form of the Irish Garbh Bhaile, meaning "rough enclosure" or "rough townland". The townland covers just over 74 acres and is only ever known to have been occupied by two households. The ruined tower stands at the junction of the R338 and the access road to St Kerrils Abbey.

The site sits along a rural road and is accessible from the junction with a minor route, surrounded by open pasture. The visible northeast section of the ruin can be seen clearly from the road, making it easy to spot and view the structure.

A handball court has been built against the northeast wall of the ruin, where three slit windows remain. Inside it a plaque commemorates Ellen Mannion, who died here in 1850 aged 25, together with her husband Michael McDermott and their two children, who sheltered in the castle after being evicted from their house.