Arlington is a principal city in the U.S. state of Texas. It is part of the Mid-Cities region of the Dallas–Fort Worth–Arlington metropolitan area, approximately 19 km east of downtown Fort Worth and 30 km west of downtown Dallas. Arlington was founded in 1876 along the Texas and Pacific Railway. The city was named after General Robert E. Lee's Arlington House in Arlington County, Virginia. Arlington grew as a cotton-ginning and farming center, and incorporated in 1884. The city could boast of water, electricity, natural gas, and telephone services by 1910, along with a public school system. By 1925 the population was estimated at 3,031, and it grew to over 4,000 before World War II. Large-scale industrialization began in 1954 with the arrival of a General Motors assembly plant. Automotive and aerospace development gave the city one of the nation's greatest population growth rates between 1950 and 1990. In 1972 the Washington Senators baseball team relocated to Arlington and began play as the Texas Rangers and in 2009 the Dallas Cowboys also began to play at the newly constructed Cowboys Stadium, now AT&T Stadium.
The Dallas–Fort Worth–Arlington, TX Metropolitan Statistical Area, the official title designated by the United States Office of Management and Budget, encompasses 13 counties within the U.S. state of Texas. Residents of the area refer to it as the Dallas/Fort Worth Metroplex, DFW, or The Metroplex. It is the economic and cultural hub of the region commonly called North Texas or North Central Texas and is the largest inland metropolitan area in the United States. The population of the Dallas–Fort Worth Metroplex is 7,233,323 according to the 2016 U.S. Census, making it the largest metropolitan area in Texas, the largest in the South, the fourth-largest in the United States, and the tenth-largest in the Americas. In 2016, DFW ascended to the number one spot in the nation in year-over-year population growth. In 2016, the metropolitan economy surpassed Houston, Texas to become the fourth largest in the U.S., with a 2016 real GDP just under $512 billion. The city's economy is primarily based on banking, commerce, telecommunications, technology, energy, healthcare and medical research, and transportation and logistics. In 2017, Dallas–Fort Worth is home to 22 Fortune 500 companies, the third-largest concentration of Fortune 500 companies in the nation behind New York City (63) and Chicago (34).