Tulsa /tls/ is the second-largest city in the state of Oklahoma and 45th-most populous city in the United States. As of July 2016[update], the population was 413,505, an increase of 12,591 over that reported in the 2010 Census. It is the principal municipality of the Tulsa Metropolitan Area, a region with 991,005 residents in the MSA and 1,251,172 in the CSA. The city serves as the county seat of Tulsa County, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties.
Tulsa was settled between 1828 and 1836 by the Lochapoka Band of Creek Native American tribe. For most of the 20th century, the city held the nickname "Oil Capital of the World" and played a major role as one of the most important hubs for the American oil industry.
Historically, a robust energy sector fueled Tulsa's economy; however, today the city has diversified and leading sectors include finance, aviation, telecommunications and technology. Two institutions of higher education within the city have sports teams at the NCAA Division I level, Oral Roberts University and the University of Tulsa.
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