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.At the 2010 census, the population of Midland was 111,147, and a 2015 estimate gave a total of 132,950, making it the twenty-fourth most populous city in the state of Texas. Due to the oil boom in Midland, certain officials have given population estimates above 155,000. It is the principal city of the Midland, Texas Metropolitan Statistical Area, which includes all of Midland County, the population of which grew 4.6 percent, between July 1, 2011 and July 1, 2012, to 151,662, respectively, according to the U.S. Census Bureau. The metropolitan area is also a component of the larger Midland−Odessa, Texas Combined Statistical Area, which had an estimated population of 295,987 on July 1, 2012. People in Midland are called Midlanders.