Plano ( PLAY-noh; Spanish for 'flat surface') is a city in the U.S. state of Texas, where it is the largest city in Collin County. A small portion of Plano is located in Denton County. Plano is one of the principal suburbs of the Dallas–Fort Worth metroplex. With a population of 285,494 at the 2020 census, it is the ninth most-populous city in Texas, and, respectively, the 74th most populous city in the United States. Plano serves as an important hub of the economy of Dallas. It is home to the headquarters of Frito-Lay, JCPenney, Pizza Hut, and Toyota Motor North America.