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Tulsa / ˈ t ʌ l s ə / is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States. As of July 2015, the population was 403,505, an increase of 11,599 over that reported in the 2010 Census. It is the principal municipality of the Tulsa Metropolitan Area, a region with 981,005 residents in the MSA and 1,151,172 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. Once heavily dependent on the oil industry, Tulsa experienced economic downturn. Subsequent diversification efforts created an economic base in the energy, finance, aviation, telecommunications and technology sectors. The Tulsa Port of Catoosa, at the head of the McClellan-Kerr Arkansas River Navigation System, is the most inland river port in the U.S. with access to international waterways. 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.It is situated on the Arkansas River at 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 world-renowned 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. 8 in the U.S. for cities of the future. In 2012, Tulsa was ranked among the top 50 best cities in the United States by BusinessWeek. People from Tulsa are called "Tulsans". Broken Arrow is a city located in the northeastern part of the U.S. state of Oklahoma, primarily in Tulsa County but also with a section of the city in western Wagoner County. It is the largest suburb of Tulsa. According to the 2010 census, Broken Arrow has a population of 98,850 residents and is the fourth-largest city in the state. However, a July 1, 2015, estimate reports that the population of the city is 106,563, making it the 280th-largest city in the United States. The city is part of the Tulsa Metropolitan Area, which has a population of 961,561 residents.The Missouri–Kansas–Texas Railroad sold lots for the town site in 1902 and company secretary William S. Fears named it Broken Arrow. The city was named for a Creek community settled by Creek Indians who had been forced to relocate from Alabama to Oklahoma along the Trail of Tears.Though Broken Arrow was originally an agricultural community, its current economy is diverse. The city has the third-largest concentration of manufacturers in the state. Barnsdall is a city in Osage County, Oklahoma, United States. The population was 1,243 at the 2010 census, a decline of 6.2 percent from 1,325 at the 2000 census.