Coahoma is a town in Howard County, Texas, United States. The population was 945 at the 2020 census, 817 at the 2010 census, and 932 at the 2000 census. Coahoma is located in eastern Howard County at 32°17′47″N 101°18′17″W / 32.29639°N 101.30472°W. Interstate 20 runs through the southern part of the city, with access from Exit 188. I-20 l…Coahoma is a town in Howard County, Texas, United States. The population was 945 at the 2020 census, 817 at the 2010 census, and 932 at the 2000 census. Coahoma is located in eastern Howard County at 32°17′47″N 101°18′17″W / 32.29639°N 101.30472°W. Interstate 20 runs through the southern part of the city, with access from Exit 188. I-20 leads west 10 miles to Big Spring, the county seat, and east 27 miles to Colorado City.