the midland–odessa, texas, combined statistical area (csa) is made up of two metropolitan statistical areas (msa) encompassing three counties. the csa includes martin and midland counties in the midland msa, and ector county in the odessa msa. the midland–odessa csa encompasses 2,720 sq mi (7,044 km) of area, of which 2,713 sq mi (7,027 km) is land and 6.6 sq mi (18 km) is water.