Oklahoma City (/oʊkləˌhoʊmə -/ (listen)), officially the City of Oklahoma City, and often shortened to OKC, is the capital and largest city of the U.S. state of Oklahoma. The county seat of Oklahoma County, it ranks 20th among United States cities in population, and is the 8th largest city in the Southern United States. The population grew following the 2010 census and reached 687,725 in the 2020 census. The Oklahoma City metropolitan area had a population of 1,396,445, and the Oklahoma City–Shawnee Combined Statistical Area had a population of 1,469,124, making it Oklahoma's largest municipality and metropolitan area by population.
Oklahoma City's city limits extend somewhat into Canadian, Cleveland, and Pottawatomie counties, though much of those areas outside the core Oklahoma County area are suburban tracts or protected rural zones (watershed). The city is the eighth-largest in the United States by area including consolidated city-counties; it is the second-largest, after Houston, not including consolidated cities. The city is also the second largest by area among state capital cities in the United States, after Juneau, Alaska.
Baota District, known as Yanzhou in ancient times, is located in the northern Shaanxi Province and the hilly and gully region of the Loess Plateau in northern Shaanxi. It is known as "Qin important area" and "plugged throat". The Xia Dynasty belonged to Yongzhou, it was successively under the jurisdiction of Di, Jin, Wei and Qin in the Spring and Autumn and warring States period, and it was established in the Han Dynasty, Yanzhou or Yan'an House in the Sui and Tang dynasties, and Fushi after the Song Dynasty. After the Republic of China, it was renamed Yan'an County. In 1937, the Central Committee of the Communist Party of China entered Yan'an and established Yan'an City, which is the seat of the government of the Shaanxi-Gansu-Ningxia Border region. In December 1996, Yan'an withdrew to set up the city, and Yan'an was renamed Baota District. It is the seat of the Yan'an Municipal Party Committee and Municipal Government, and it is the central city of Yan'an. The total land area of the region is 3556 square kilometers, with a registered population of 481200 (2017) and a resident population of 491800 (2017). It has jurisdiction over 9 towns, 4 townships and 5 cities.