Oklahoma City, with a population of 531,324 in 2005, has the largest population of any city in the state. With an area of 1,608 sq km (621 sq mi), it is also one of the largest cities geographically in the United States. Oklahoma City is the capital and principal retail and wholesale center of Oklahoma. Tinker Air Force Base, one of the largest air matériel centers in the nation, is located in the southeastern part of the city. Edmond (76,644) is a nearby residential community. Tulsa is the second largest city of the state, with a population of 382,872, and is often referred to as the oil capital of the world. Tulsa is also an important manufacturing center. Petroleum refining and airplane manufacturing are leading industries in the city. Residential suburbs include Broken Arrow (88,314).
Lawton is the wholesale and retail trade center for southwestern Oklahoma. The city, which had a population of 87,540, is also the service center for Fort Sill Army Base, which borders it on the north. Norman, with 102,827 inhabitants, is the home of the University of Oklahoma. Located less than 30 km (20 mi) south of Oklahoma City, Norman is largely a residential and service center for students at the University of Oklahoma and people working in the Oklahoma City metropolitan area but has recently added industries to this base. Midwest City sprang up during World War II, because of its proximity to Tinker Field. Many of its 54,890 residents are employed in the aircraft industry, which services the U.S. Air Force. Enid, which has 46,514 inhabitants, is the leading agricultural service center of the state. Bartlesville, with 34,885 inhabitants, is an important center for mineral research and is a corporate headquarters to Phillips Petroleum, a major U.S oil producer. "Oklahoma" © Emmanuel BUCHOT, Encarta, Wikipedia
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