Odessa /ods/ is a city in and the county seat of Ector County, Texas, United States. It is located primarily in Ector County, although a small portion of the city extends into Midland County. Odessa's population was 118,918 at the 2010 census making it the 29th-most populous city in Texas; estimates as of July 2015 indicate a population of 159,436 in the city. It is the principal city of the Odessa Metropolitan Statistical Area, which includes all of Ector County. The metropolitan area is also a component of the larger MidlandOdessa combined statistical area, which had a 2010 census population of 278,801; a recent report from the United States Census Bureau estimates that the combined population as of July 2015 is 320,513. In 2014, Forbes magazine ranked Odessa as the third fastest-growing small city in the United States.