Umatilla (ˌjuməˈtɪlə, ) is a city in Umatilla County, Oregon, United States. The population in 2010 was 6,906, but the city's population includes approximately 2,000 inmates incarcerated at Two Rivers Correctional Institution.
Umatilla is part of the Hermiston-Pendleton Micropolitan Statistical Area, but has the highest poverty rate (24%) and lowest Median Household Income ($38,796), of all communities in the area; trailing neighboring Hermiston in household income by nearly 23%.
The city is on the south side of the Columbia River along U.S. Route 730 and I-82. The Umatilla Chemical Depot, is southwest of the city, northwest of the intersection of I-84 and I-82.
Before European settlement, the peninsula formed by the convergence of the Umatilla and Columbia rivers had been occupied by the indigenous Umatilla people for at least 10,000 years, being the site of temporary and seasonal villages, fishing and later horse breeding. On their retur