Adjacent counties

• Tillamook County (northwest)
• Yamhill County (north)
• Marion County (east)
• Linn County (southeast)
• Benton County (south)
• Lincoln County (west)

National protected areas

• Baskett Slough National Wildlife Refuge
• Siuslaw National Forest (part)

2020 census

As of the 2020 census, there were 87,433 people, 30,305 households,.^[9] The population density was 101.8 inhabitants per square mile (39.3/km²). There were 30,302 housing units at an average density of 40.9 units per square mile (15.8 units/km²).^[10] The racial makeup of the county was 85.9% white, 2.1% American Indian, 1.9% Asian, 0.6% black or African American, 0.3% Pacific islander, 5.4% from other races, and 3.8% from two or more races. Those of Hispanic or Latino origin made up 12.1% of the population.^[9] In terms of ancestry, 22.4% were German, 16.4% were English, 10.4% were Irish, and 6.4% were American.^[11]

Of the 28,288 households, 32.4% had children under the age of 18 living with them, 54.2% were married couples living together, 10.3% had a female householder with no husband present, 30.9% were non-families, and 23.0% of all households were made up of individuals. The average household size was 2.60 and the average family size was 3.06. The median age was 37.1 years.^[9]

The median income for a household in the county was $50,975 and the median income for a family was $61,418. Males had a median income of $46,616 versus $35,371 for females. The per capita income for the county was $24,345. About 8.8% of families and 12.9% of the population were below the poverty line, including 17.2% of those under age 18 and 6.8% of those age 65 or over.^[12]

2010 census

As of the 2010 census, there were 75,403 people, 28,288 households, and 19,545 families living in the county. The population density was 102 inhabitants per square mile (39/km²). There were 30,302 housing units at an average density of 41 units per square mile (16 units/km²). The racial makeup of the county was 85.9% White, 0.6% Black or African American, 2.1% Native American, 1.9% Asian, 0.3% Pacific Islander, 5.4% from other races, and 3.8% from two or more races. 12.1% of the population were Hispanic or Latino of any race.

There were 28,288 households in 2010, out of which 32.4% had children under the age of 18 living with them, 54.2% were married couples living together, 10.3% had a female householder with no husband present, and 30.9% were non-families. 23% of all households were made up of individuals, and 9.8% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.06.

In the county, the population was spread out, with 24.3% under the age of 18 and 14.8% 65 years of age or older. The median age was 37.1 years. For every 100 females, there were 94.8 males. For every 100 females age 18 and over, there were 91.8 males.

As of the 2000 census, the median income for a household in the county was $42,311, and the median income for a family was $50,483. Males had a median income of $36,667 versus $26,272 for females. The per capita income for the county was $19,282. About 6.30% of families and 11.50% of the population were below the poverty line, including 12.50% of those under age 18 and 5.50% of those age 65 or over.

Presidential Elections

Cities

• Dallas (county seat)
• Falls City
• Independence
• Monmouth
• Salem (part)
• Willamina (part)

Census-designated places

• Eola
• Fort Hill
• Grand Ronde
• Rickreall

Unincorporated communities