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.

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

White

Two or more races

Other race

Native American

Asian

Black or African American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	8,827	78.98%
Two or more races	1,371	12.27%
Other race	354	3.17%
Native American	246	2.2%
Asian	188	1.68%
Black or African American	124	1.11%
Native Hawaiian or Pacific Islander	66	0.59%

Monmouth Marital Status

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