Monmouth Flag

Monmouth

County:
Polk County
County Seat:
No
Area (mi²):
2.239
State:
Oregon

Monmouth is a city located in Polk County, Oregon. Monmouth has a 2025 population of 11,352. Monmouth is currently growing at a rate of 0.36% annually and its population has increased by 1.84% since the most recent census, which recorded a population of 11,147 in 2020.

The average household income in Monmouth is $84,582 with a poverty rate of 15.58%.The median age in Monmouth is 26.2 years: 25.7 years for males, and 27.2 years for females.

11.4K
Total Population
5,071
Density (mi²)
41 0.36%
Growth

Monmouth Population

Monmouth Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Monmouth includes 78.98% White, 3.17% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White8,82778.98%
Two or more races1,37112.27%
Other race3543.17%
Native American2462.2%
Asian1881.68%
Black or African American1241.11%
Native Hawaiian or Pacific Islander660.59%

Monmouth Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Monmouth's average per capita income is $38,453. Household income levels show a median of $66,858. The poverty rate stands at 15.58%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$92,250-
Families$81,964$95,498
Households$66,858$84,582
Non Families$27,450$52,584

$38,453

Average Income

$66,858

Median Household Income

15.58%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)