Polk County


waterfountain sculpture
A fountain at a park in Independence. (Oregon State Archives Scenic Image 20130502-D8C_0698​​)
County Seat: Courthouse, 850 Main St., Dallas 97338
Phone: 503-623-8173 (General); 503-623-3154 (Court Administrator)
Fax: 503-623-0896


Established: Dec. 22, 1845
Elev. at Dallas: 325'
Area: 745 sq. mi.
Average Temp.: January 39.1°  July 65.6°
Assessed Value: $7,082,007,884
Real Market Value: $12,819,110,294
(includes the value of non-taxed properties)
Annual Precipitation: 51.66"
Economy: Agriculture, forest products, manufacturing, electronics and education

Related Resources

"County QuickFacts" (population and economic data from U.S. Census Bureau)
County Seat Map (from Google Maps)
County Map (from ODOT) 

Incorporated Cities

Points of Interest

Western Oregon University, covered bridges, historic courthouse, Brunk House, Baskett Slough Wildlife Refuge, mountain scenery, wineries, National Historic Trail, Confederated Tribes of Grand Ronde Headquarters, Spirit Mountain Casino

History and General Information 

Polk County was created from the original Yamhill district in 1845 by the Provisional Legislature. It was named for then President James Knox Polk. The first county seat was at Cynthia Ann. City officials later changed its name to Dallas, after Vice-President George M. Dallas, and moved the community about a mile to improve its water supply.

The first courthouse was at Cynthia Ann. A second courthouse burned in 1898 and was replaced with the present building built with sandstone quarried three miles west of Dallas. A three-story office annex was completed in 1966. Polk County Human Services was consolidated in the newly acquired Academy Building in 1989.

Traveling back roads in Polk County will reveal many attractions, from covered bridges and pleasant parks to vineyards, wineries, and bed and breakfast lodgings spotting the surrounding hills. Many roads meander through beautiful fertile valleys from the Willamette River to the timbered foothills of the Coast Range. Polk County was the primary destination of early wagon trains which took the southern route to Oregon. Cities located in Polk County include Dallas, Independence, Monmouth, Falls City and portions of Salem and Willamina.

County Officials

Commissioners—Chair Craig Pope 2027, Jeremy Gordon 2027, Lyle R. Mordhorst 2025; Dist. Atty. Aaron Felton 2025; Assess. Valerie Patoine 2025; Clerk Kim Basso Williams​ 2025; Sheriff Mark A. Garton 2025; Surv. Eric Berry; Treas. Steve Milligan 2025; Co. Admin. Greg P. Hansen