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Monroe, Oregon
Location in Oregon
Location in Oregon
Country United States
State Oregon
County Benton
Incorporated 1914
 • Total 0.51 sq mi (1.31 km2)
 • Land 0.51 sq mi (1.31 km2)
 • Water 0.00 sq mi (0.00 km2)
288 ft (88 m)
 • Total 617
 • Estimate 
 • Density 1,295.05/sq mi (500.00/km2)
Time zone UTC-8 (Pacific)
 • Summer (DST) UTC-7 (Pacific)
ZIP code
Area code(s) 541
FIPS code 41-49600
GNIS feature ID 1124292

Monroe is a city in Benton County, Oregon, United States. The population was 651 at the 2018 census. It is part of the Corvallis, Oregon Metropolitan Statistical Area. Monroe is located midway between Eugene and Corvallis along Highway 99W and the city experiences a strong friendly rivalry between fans of the Oregon Ducks and the Oregon State Beavers.


According to the United States Census Bureau, the city has a total area of 0.51 square miles (1.32 km2), all of it land.


The city formed around a small sawmill established by Joseph White in 1852. By 1853, there was a small settlement known as White's Mill. Around the same time, Roland Hinton formed the town of Starr Point north of White's Mill. In 1857, Starr Point combined with White's Mill to form the town of Monroe. The city quickly became a center for paddle boat traffic.

It was one of the largest cities in the state for many years. Monroe High School was built in the 1920s. Since the construction of I-5 in the 1960s, the city has turned into a rural farming community. It is the home of historic Hull-Oakes Lumber Mill, the only steam-powered sawmill operating in the U.S.


Historical population
Census Pop.
1880 135
1920 191
1930 227 18.8%
1940 311 37.0%
1950 362 16.4%
1960 374 3.3%
1970 443 18.4%
1980 412 −7.0%
1990 448 8.7%
2000 607 35.5%
2010 617 1.6%
2019 (est.) 654 6.0%
U.S. Decennial Census

2010 census

As of the census of 2010, there were 617 people, 251 households, and 165 families residing in the city. The population density was 1,209.8 inhabitants per square mile (467.1/km2). There were 277 housing units at an average density of 543.1 per square mile (209.7/km2). The racial makeup of the city was 89.0% White, 0.2% African American, 1.3% Native American, 0.2% Asian, 6.6% from other races, and 2.8% from two or more races. Hispanic or Latino people of any race were 16.2% of the population.

There were 251 households, out of which 26.7% had children under the age of 18 living with them, 46.6% were married couples living together, 12.0% had a female householder with no husband present, 7.2% had a male householder with no wife present, and 34.3% were non-families. 25.1% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.92.

The median age in the city was 42.7 years. 21.6% of residents were under the age of 18; 7.7% were between the ages of 18 and 24; 23.7% were from 25 to 44; 33.7% were from 45 to 64; and 13.1% were 65 years of age or older. The gender makeup of the city was 50.2% male and 49.8% female.

Notable people

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