Dallas (pron.: /ËdÃ¦lÉs/) is the ninth most populous city in the United States and the third most populous city in the state of Texas. The Dallas-Fort Worth metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States. The bulk of the city is in Dallas County, of which it is the county seat. However, slices of the city are located in Collin, Denton, Kaufman, and Rockwall counties. The city had a population of 1,197,816 in 2010, according to the United States Census Bureau.
The city is the largest economic center of the 12-county DallasâFort WorthâArlington metropolitan area (the DFW MSA) had a population of 6,645,678 in 2012. The metroplex economy is the sixth largest in the United States, with a 2010 gross metropolitan product of $374 billion. Its 2010 Real GDP amounted to $325 billion.
Dallas was founded in 1841 and was formally incorporated as a city in February 1856. The city's economy is primarily based on banking, commerce, telecommunications, computer technology, energy, healthcare and medical research, transportation and logistics. The city is home to the third largest concentration of Fortune 500 companies in the nation. Located in North Texas and a major city in the American South, Dallas is the main core of the largest inland metropolitan area in the United States that lacks any navigable link to the sea.
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. With the advent of the interstate highway system in the 1950s and 1960s, Dallas became an east/west and north/south focal point of the interstate system with the convergence of four major interstate highways in the city, along with a fifth interstate loop around the city. Dallas developed a strong industrial and financial sector, and a major inland port, due largely to the presence of Dallas/Fort Worth International Airport, one of the largest and busiest airports in the world.