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Home > Local > Counties > Umatilla County

Umatilla County

The Umatilla Bridge on the Columbia River at Umatilla.

The Umatilla Bridge on the Columbia River at Umatilla. (Oregon State Archives Photo)

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County Seat: Courthouse, 216 SE 4th St., Pendleton 97801
Phone: 541-276-7111 (General); 541-278-0341, Pendleton, 541-667-3020, Hermiston (Court Administrators)
Fax: 541-278-5463


Population (2016): 79,730
Established: Sept. 27, 1862
Elev. at Pendleton: 1,069'
Area: 3,231 sq. mi.
Average Temp.: January 31.9° July 73.6°
Assessed Value: $5,398,880,336
Real Market Value: $8,313,097,425
Annual Precipitation: 12.97"
Economy: Agriculture, food processing, forest products, tourism, manufacturing, recreation, aggregate production and wind power generation


Umatilla County map

Related resources
Historical Records Inventory
Scenic Image
"County QuickFacts" (population and economic data from U.S. Census Bureau)
County Seat Map (from Yahoo! Maps)
County Map (from ODOT)


Incorporated cities
Adams | Athena | Echo | Helix | Hermiston | Milton-Freewater | Pendleton | Pilot Rock | Stanfield | Ukiah | Umatilla | Weston


Points of interest
Pendleton Round-Up, Pendleton Woolen Mills, Old Town Pendleton, County Historical Society, Pendleton Underground, McNary Dam and Recreation Area, Echo Museum and Historic Area, Hat Rock, Battle Mountain and Emigrant Springs State Parks, Weston Historic District, Frazier Farmstead Museum in Milton-Freewater, North Fork Umatilla Wilderness Area, Tollgate-Spout Springs Recreation Area, Courthouse Clock Tower, Stateline Wind Project, Confederated Tribes of the Umatilla Indian Reservation’s Wildhorse Casino and Tamastslikt Cultural Center


History and general information
Umatilla County traces its creation in 1862 to the regional gold rushes, which spawned the riverport of Umatilla City and brought stockraisers to the lush grasslands.

Although Lewis and Clark and the Oregon Trail pioneers passed through Umatilla County, it did not bloom until the arrival of the railroad in 1881 and the development of dryland wheat farming.

Water in the form of irrigation has been key to economic diversification and growth, most recently in the Hermiston area, where the desert now yields lush watermelons and other products. Tourism is also increasingly important to Umatilla County where “Let-er-Buck” is heard by Pendleton Round-Up crowds.


County officials
Commissioners—Chair Bill Elfering 2021, Larry Givens 2019, George Murdock 2019; Dist. Atty. Daniel R. Primus 2021; Sheriff Terry Rowan 2021; Assess. Paul Chalmers; Rec. Mgr. Steve Churchill; Surv. David Krumbein; Financial Mgr. Robert Pahl; Admin. Serv. Dir. Dan Lonai


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