Tulsa is the second-largest city in the state of Oklahoma and 45th-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. 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 mobs killed blacks, looted and robbed the community, and burned down homes and businesses.
Historically, a robust energy sector fueled Tulsa's economy; however, today the city has diversified and leading sectors include finance, aviation, telecommunications and technology.