About the County

Marion County is located in the heart of the Willamette Valley.

Located south of the Portland metropolitan area, Marion County stretches from the Willamette River to the Cascade Mountains encompassing nearly 1,200 square miles. Most of its population of 315,900 can reach the Pacific beaches in under two hours.

Our History

Marion County, then called Champooick, was created in 1843 by the Provisional Government Legislative Committee 16 years before Oregon gained statehood on February 14, 1859. In 1849 the name was changed to Marion honoring American Revolutionary General Francis Marion.

The county is located in the heart of the Willamette Valley, and the Willamette River was established as its western boundary in 1856. Salem, the county seat and the state capital, is one of the valley's oldest cities. Among its public buildings are the Courthouse, Courthouse Square, State Capitol, Capitol Mall buildings and Salem Civic Center. The county was presided over by the Marion County Court until January 1, 1963, when the court was abolished and replaced by a Board of Commissioners.

 

Quick Facts

Capital: Salem

Area: 1,194 square miles

Established: July 5, 1843

Population: 318,150 (PSU 2011)

Cities: 20 incorporated

Elevation: 154 feet at Salem

Average Temp: Jan. 39.3 F; July 66.3 F

Annual Precipitation: 40.35 inches

Principal Industries: Government, food processing, lumber, manufacturing, education, tourism, and agriculture.

       

 

Around Marion County

There are 20 incorporated cities and 37 unincorporated communities in Marion County. As reported by the 2010 Census, the total population of Marion County was 315,900.

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​Incorporated Cities

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Aumsville
Population: 3584
Aurora
Population: 918
Detroit
Population: 202
Donald
Population: 979
Gates
Population: 471
Gervais
Population: 2464
Hubbard
Population: 3173
Idahna
Population: 134
Jefferson
Population: 3098
Keizer
Population: 36478
Mill City
Population: 1855
Mt. Angel
Population: 3286
Salem
Population: 154637
Scotts Mills
Population: 357
Silverton
Population: 9222
St. Paul
Population: 421
Stayton
Population: 7644
Sublimity
Population: 2681
Turner
Population: 1854
Woodburn
Population: 24080
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Uni​ncorporated Communities

Breitenbush
Broadacres
Brooks
Butteville
Central Howell
Clear Lake
Concomly
Crestwood
Downs
Drakes Crossing
Elkhorn
Fargo
Hazel Green
Hopmere
Labish Center
Little Sweden
Lone Pine Corner
Macleay
Marion
Mehama
Monitor
Niagara
North Howell
North Santiam
Orville
Pratum
Roberts
Rockie Four Corners
Rosedale
Shaw
Sidney
Skunkville
St. Louis
Sunnyside
Talbot
Waconda
West Stayton
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