Pendleton is a city in Umatilla County, Oregon, United States. Pendleton was named in 1868 by the county commissioners for George H. Pendleton, Democratic candidate for Vice-President in the 1864 presidential campaign. The population was 16,354 at the 2000 census. The 2006 estimate is 17,310 residents. It is the county seat of Umatilla County. Pendleton apartments for rent comparison page shows most up to date rent information on Pendleton apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.