Macroom (/mə.ˈkruːm/ ; Irish: Maigh Chromtha) is a market town and civil parish in the barony of Muskerry West, County Cork, Ireland.It is situated in a valley of the River Sullane, about halfway between Cork city and Killarney.acroom was the main base in Cork for the British Auxiliary Division during the 1919–1921 Irish War of Independence. The Irish Republican Army was highly active in the county, especially in the areas around Macroom, Bandon and Dunmanway.