Monmouth (/ˈmɒnməθ/) is a city in Polk County in the U.S. state of Oregon. It was named for Monmouth, Illinois, the origin of its earliest settlers. The population is 9,534 at the 2010 Census and it is part of the Salem Metropolitan Statistical Area.
Monmouth is about 12 miles (19 km) west of Salem on Oregon Route 99W. It lies in the Ash Creek watershed, slightly west of the Willamette River.
According to the United States Census Bureau, the city has a total area of 2.24 square miles (5.80 km), all of it land.
As of the census of 2010, there were 9,534 people, 3,247 households, and 1,769 families residing in the city. The population density was 4,256.3 inhabitants per square mile (1,643.4/km). There were 3,450 housing units at an average density of 1,540.2 per square mile (594.7/km). The racial makeup of the city was 82.8% White, 1.1% African American, 1.5% Native American, 3.3% Asian, 0.6% Pacific Islander, 6.6% from other races, and 4.1% from two or more races. Hispanic or Latino of any race were 13.4% of the population.
There were 3,247 households of which 26.8% had children under the age of 18 living with them, 41.8% were married couples living together, 9.4% had a female householder with no husband present, 3.3% had a male householder with no wife present, and 45.5% were non-families. 23.9% of all households were made up of individuals and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.07.
The median age in the city was 23.7 years. 18.2% of residents were under the age of 18; 34.9% were between the ages of 18 and 24; 20.8% were from 25 to 44; 16.8% were from 45 to 64; and 9.4% were 65 years of age or older. The gender makeup of the city was 47.9% male and 52.1% female.
As of the census of 2000, there were 7,741 people, 2,757 households, and 1,488 families residing in the city. The population density was 4,004.3 people per square mile (1,548.6/km²). There were 2,934 housing units at an average density of 1,517.7 per square mile (587.0/km²). The racial makeup of the city was 85.67% White, 0.92% African American, 1.05% Native American, 2.04% Asian, 0.74% Pacific Islander, 6.21% from other races, and 3.37% from two or more races. Hispanic or Latino of any race were 9.73% of the population.
There were 2,757 households out of which 26.6% had children under the age of 18 living with them, 41.7% were married couples living together, 9.4% had a female householder with no husband present, and 46.0% were non-families. 24.4% of all households were made up of individuals and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.03.
In the city, the population was spread out with 19.5% under the age of 18, 35.9% from 18 to 24, 21.2% from 25 to 44, 14.5% from 45 to 64, and 8.9% who were 65 years of age or older. The median age was 23 years. For every 100 females, there were 86.9 males. For every 100 females age 18 and over, there were 81.3 males.
The median income for a household in the city was $32,256, and the median income for a family was $48,600. Males had a median income of $33,500 versus $25,185 for females. The per capita income for the city was $14,474. About 7.1% of families and 24.6% of the population were below the poverty line, including 14.1% of those under age 18 and 5.6% of those age 65 or over.
Monmouth Oregon neighborhoods include: Fernscorner/Cedar Haven, Fishback Rd, Monmouth, N Airlie/Kings Valley, Pedee, Western Ashcreek