Athlone is a town on the border of County Roscommon and County Westmeath, Ireland. It is located on the River Shannon near the sout…Athlone is a town on the border of County Roscommon and County Westmeath, Ireland. It is located on the River Shannon near the southern shore of Lough Ree. It is the second most populous town in the Midlands Region with a population of 22,869 in the 2022 census.