Dallas is a city in the U.S. state of Texas. It is the most populous
city in the Dallas–Fort Worth metroplex, which is the fourth most
populous metropolitan area in the United States. The city's population
ranks ninth in the U.S. and third in Texas after Houston and San
Antonio. The city's prominence arose from its historical importance
as a center for the oil and cotton industries, and its position
along numerous railroad lines. The bulk of the city is in Dallas
County, of which it is the county seat; however, sections of the city
are located in Collin, Denton, Kaufman, and Rockwall counties.
According to the 2010 United States Census, the city had a population
of 1,197,816. The United States Census Bureau's estimate for the city's
population increased to 1,317,929 as of July 1, 2016.