Macroom is a market town in County Cork, Ireland, located in the valley of the River Sullane, halfway between Cork city and Killarney. Its population has grown and receded over the centuries as it went through periods of war, famine and workhouses, forced emigration and intermittent prosperity. The 2011 census gave an urban population of 3,879 people, while th…Macroom is a market town in County Cork, Ireland, located in the valley of the River Sullane, halfway between Cork city and Killarney. Its population has grown and receded over the centuries as it went through periods of war, famine and workhouses, forced emigration and intermittent prosperity. The 2011 census gave an urban population of 3,879 people, while the 2016 census recorded 3,765 people. The town is in a civil parish of the same name.