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Mill City, Oregon
Pedestrian bridge over the North Santiam River at Mill City
Pedestrian bridge over the North Santiam River at Mill City
Location in Oregon
Location in Oregon
Country United States
State Oregon
Counties Linn, Marion
Incorporated 1947
 • Total 0.84 sq mi (2.19 km2)
 • Land 0.84 sq mi (2.19 km2)
 • Water 0.00 sq mi (0.00 km2)
832 ft (253.6 m)
 • Total 1,855
 • Estimate 
 • Density 2,331.75/sq mi (900.41/km2)
Time zone UTC-8 (Pacific)
 • Summer (DST) UTC-7 (Pacific)
ZIP code
Area code(s) 503 and 971
FIPS code 41-48150
GNIS feature ID 1124148

Mill City is a city in Linn and Marion counties in the U.S. state of Oregon on Oregon Route 22. The population was 1,855 at the 2010 census. It is on the North Santiam River, downstream from Detroit Lake.

The Linn County portion of Mill City is part of the AlbanyLebanon Micropolitan Statistical Area, while the Marion County portion is part of the Salem Metropolitan Statistical Area. The City of Mill City contracts through The Linn County Sheriff's Office for local law enforcement, however does have its own Mill City Fire Department and other public works departments.

In September 2020, Mill City suffered extensive damage from the Santiam Fire.


According to the United States Census Bureau, the city has a total area of 0.83 square miles (2.15 km2), all land.


Historical population
Census Pop.
1950 1,792
1960 1,289 −28.1%
1970 1,451 12.6%
1980 1,565 7.9%
1990 1,555 −0.6%
2000 1,537 −1.2%
2010 1,855 20.7%
2019 (est.) 1,968 6.1%
U.S. Decennial Census

2010 census

As of the census of 2010, there were 1,855 people, 681 households, and 475 families residing in the city. The population density was 2,234.9 inhabitants per square mile (862.9/km2). There were 742 housing units at an average density of 894.0 per square mile (345.2/km2). The racial makeup of the city was 90.7% White, 0.4% African American, 1.9% Native American, 0.4% Asian, 0.6% Pacific Islander, 2.0% from other races, and 3.9% from two or more races. Hispanic or Latino of any race were 9.2% of the population.

There were 681 households, of which 36.1% had children under the age of 18 living with them, 49.3% were married couples living together, 13.8% had a female householder with no husband present, 6.6% had a male householder with no wife present, and 30.2% were non-families. 22.8% of all households were made up of individuals, and 8.1% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.14.

The median age in the city was 36.2 years. 27.9% of residents were under the age of 18; 8.2% were between the ages of 18 and 24; 24.2% were from 25 to 44; 26.3% were from 45 to 64, and 13.5% were 65 years of age or older. The gender makeup of the city was 51.8% male and 48.2% female.


In the early and mid 1900s Mill City was served by Mill City High School which was eventually moved to Santiam High School after its completion in the 1950s. The old high school building was used until the late 1980s as Mill City Middle School but demolished and replaced by a new facility on the same site.

Previous to 2000, Mill City, Gates, Detroit and Idanha were served by separate schools and districts; however, eventually Mill City became the education center for the Santiam Canyon with the closing of Gates Elementary School in 2012.

As of the 2019 school year Mill City and the rest of the Santiam Canyon is home to Santiam Preschool/Early Childhood Center, Santiam Elementary School, Santiam Junior/Senior High School and Oregon Connections Academy. Mill City is served by the Santiam Canyon School District.

Santiam Jr/Sr High School is home to the Santiam Wolverines, mascot for the athletic programs including football, basketball, volleyball, baseball, softball, cross country and track and field. The Wolverines have had recent success in basketball taking the 2016/17 2A State Championships and in football taking second place in 2A in the 2017 and 2018 seasons.

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