Cleveland County, Oklahoma in the context of Desert rose (crystal)

Oklahoma City (/ˌoʊkləˈhoʊmə -/ OH-klə-HOH-mə -⁠), often shortened to OKC, is the capital and most populous city of the U.S. state of Oklahoma. It is the 20th-most populous U.S. city and 8th largest in the Southern United States, with a population of 681,054 at the 2020 census. The Oklahoma City metropolitan area, with an estimated 1.49 million residents, is the largest metropolitan area in the state and 42nd-most populous in the country. It is the county seat of Oklahoma County, with the city limits extending into Canadian, Cleveland, and Pottawatomie counties; however, areas beyond Oklahoma County primarily consist of suburban developments or areas designated rural and watershed zones. Oklahoma City ranks as the tenth-largest city by area in the United States when including consolidated city-counties, and second-largest when such consolidations are excluded. It is also the second-largest state capital by area, after Juneau, Alaska.

Oklahoma City has one of the world's largest livestock markets. Oil, natural gas, petroleum products, and related industries are its economy's largest sector. The city is in the middle of an active oil field, and oil derricks dot the capitol grounds. The federal government employs a large number of workers at Tinker Air Force Base and the United States Department of Transportation's Mike Monroney Aeronautical Center (which house offices of the Federal Aviation Administration and the Transportation Department's Enterprise Service Center, respectively).

The Oklahoma City metropolitan area is an urban region in Central Oklahoma. It is the largest metropolitan area in the state of Oklahoma and contains the state capital and principal city, Oklahoma City. It is often known as the Oklahoma City Metro (sometimes shortened to simply "the Metro"), or Greater Oklahoma City in addition to the nicknames Oklahoma City itself is known for, such as OKC or "the 405".

Counties in the Oklahoma City metropolitan area include Canadian, Cleveland, Grady, Lincoln, Logan, McClain, and Oklahoma. According to the 2020 U.S. census, the metropolitan region had a population of 1,425,695, up from 1,083,346 at the 2000 census.

The Land Rush of 1889 was the first land run into the Unassigned Lands of the former western portion of the federal Indian Territory, which had decades earlier since the 1830s been assigned to the Creek and Seminole native peoples. The area that was opened to settlement included all or part of the Canadian, Cleveland, Kingfisher, Logan, Oklahoma, and Payne counties of the present-day U.S. state of Oklahoma. The land run started at high noon (12:00 pm) on April 22, 1889. An estimated 50,000 people were lined up at the start, seeking to gain a piece of the available two million acres (8,100 km).

The Unassigned Lands were considered some of the best unoccupied public land in the United States. The Indian Appropriations Act of 1889 was passed and signed into law with an amendment by congressman William McKendree Springer authorized 23rd President Benjamin Harrison, to open the two million acres (8,100 km) of the western portion of the remaining Indian Territory (established in 1834 with a much greater allotment set aside for the southeastern native tribes of extensive lands of the previous Louisiana Purchase of 1803, west of the Mississippi River), during the administration of 7th President Andrew Jackson (1767-1845, served 1829-1837).

Norman (/ˈnɔːrmən/) is the third-most populous city in the U.S. state of Oklahoma, with a population of 128,026 as of the 2020 census. It is the most populous city in and the county seat of Cleveland County and the second-most populous city in the Oklahoma City Metro Area after the state capital, Oklahoma City, 20 miles (32 kilometers) north of Norman.

The city was settled during the Land Run of 1889, which opened the former Unassigned Lands of Indian Territory to American pioneer settlement. It was named in honor of Abner Norman, the area's initial land surveyor, and was formally incorporated on May 13, 1891. Norman has prominent higher education and related research industries, as it is home to the University of Oklahoma, the largest university in the state, with nearly 32,000 students. The university is well known for its sporting events by teams under the banner of the nickname "Sooners", with over 85,000 people routinely attending football games. The university is home to several museums, including the Fred Jones Jr. Museum of Art, which contains the largest collection of French Impressionist art ever given to an American university, as well as the Sam Noble Oklahoma Museum of Natural History.