Texas County is a county located in the southern portion of the U.S. state of Missouri. As of the 2020 census, the population was 24,487. Its county seat is Houston. The county was organized in 1843 as Ashley County. Its name was changed in 1845 to Texas County, after the Republic of Texas. The 2010 U.S. Census indicates that the county was the center of population for the United States.

The mean center of the United States population is determined by the United States Census Bureau from the results of each national census. The Bureau defines it as follows:The concept of the center of population as used by the U.S. Census Bureau is that of a balance point. The center of population is the point at which an imaginary, weightless, rigid, and flat surface representation of the 50 states and the District of Columbia would balance if weights of identical size were placed on it so that each weight represented the location of one person. More specifically, this calculation is called the mean center of population.