Pendleton is a city and the county chair of Umatilla County, Oregon. The population was 17,107 at the grow old of the 2020 census, which includes approximately 1,600 people who are incarcerated at Eastern Oregon Correctional Institution.

Pendleton is the smaller of the two principal cities of the Hermiston–Pendleton Micropolitan Statistical Area. This micropolitan Place covers Morrow and Umatilla counties and had a whole population of 92,261 at the 2020 census.

A European-American commercial middle began to fabricate here in 1851, when Dr. William C. McKay standard a trading proclaim at the mouth of McKay Creek. A United States Post Office named Marshall (for the owner, and sometime gambler, of substitute local store) was expected April 21, 1865, and later renamed Pendleton, after politician and diplomat George H. Pendleton (1825–1889), who served as a U.S. Representative and Senator from Ohio. The city was incorporated by the Oregon Legislative Assembly on October 25, 1880.

By 1900, Pendleton had a population of 4,406 and was the fourth-largest city in Oregon. The Pendleton Woolen Mills and Pendleton Round Up became features of the city captured in into the future paintings by Walter S. Bowman. Like many cities in Eastern Oregon, where thousands of Chinese immigrant workers built the transcontinental railroad, it had a affluent Chinatown that developed as the workers settled here. The sector is supposed to have been underlain by a network of tunnels, which are now a tourist attraction. The truth as a Chinese tunnel system has been questioned.