Tulsa is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States. As of July 2019, the population was 401,190, an increase of 11,129 since 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 and most of Tulsa is still part of the territory of the Muscogee (Creek) Nation. In the early 20th century, Tulsa was home to the "Black Wall Street", one of the most prosperous Black communities in the United States at the time. In 1921, the community was the site of the Tulsa race massacre, "the single worst incident of racial violence in American history." White and black gunmen clashed in the streets and the prosperous black Greenwood District was completely destroyed, its homes and businesses burned down and its residents expelled.
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. 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.
It is situated on the Arkansas River between the Osage Hills and the foothills of the Ozark Mountains in northeast Oklahoma, a region of the state known as "Green Country". Considered the cultural and arts center of Oklahoma, Tulsa houses two art museums, full-time professional opera and ballet companies, and one of the nation's largest concentrations of art deco architecture. The city has been called one of America's most livable large cities by Partners for Livable Communities, Forbes, and Relocate America. FDi Magazine in 2009 ranked the city no.