Cruachan may refer to:
Ireland Cruachan, Ireland, the ancient capital of the kingdom of Connachta in Ireland Croaghaun, a mountain on Achill island, County Mayo (Irish name: Cruachán) Cruachan (band), an Irish folk metal band
Scotland Ben Cruachan, a Scottish mountain Cruachan Dam, a hydropower station at Ben Cruachan Cruachan, the name of a Shetland pony as mascot of the Argyll and Sutherland Highlanders (now of the Royal Regiment of Scotland) Cruachan! is the battle cry of the Highland clans Campbell and MacIntyre