Midland is a city in and the county seat of Midland County, Texas, United States. A small part o…Midland is a city in and the county seat of Midland County, Texas, United States. A small part of Midland is in Martin County. At the 2020 census, Midland's population was 132,524. 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% between July 1, 2011, and July 1, 2012, to 151,662, according to the U.S. Census Bureau. The metropolitan area is part of the larger Midland–Odessa combined statistical area, which had a population of 340,391 in the 2020 census. People in Midland are called Midlanders.