Midland is a city in and the county seat of Midland County, Texas, United States, on the Southern Plains of the state's western area. A small portion of the city extends into Martin County. As of the 2010 census, the population of Midland was 111,147, and a 2011 estimate of 113,931, making it the twenty-eighth most populous city in the state of Texas. Due to the oil boom in Midland, certain officials have estimated the population to be hovering around 155,000 to 165,000. The Midland metropolitan area's, composed of Midland County, population grew 4.6 percent to 151,662 between July 1, 2011 and July 1, 2012, according to the U.S. Census Bureau. It is the principal city of the Midland, Texas Metropolitan Statistical Area, which includes all of Midland County. The metropolitan area is also a component of the larger MidlandâOdessa, Texas Combined Statistical Area, which had an estimated population of 274,002 as of July 1, 2010. People in Midland are called Midlanders.