McEwen is a city in Humphreys County, Tennessee, United States. The population was 1,750 at the 2010 census. McEwen is located in east…McEwen is a city in Humphreys County, Tennessee, United States. The population was 1,750 at the 2010 census. McEwen is located in eastern Humphreys County at 36°6′32″N 87°38′6″W / 36.10889°N 87.63500°W. U.S. Route 70 passes through the center of the city, leading east 14 miles to Dickson and west 9 miles to Waverly, the Humphreys county seat. Tennessee State Route 231 leads north 18 miles to Erin.