Monmouth, Oregon Demographics & Population 2026
During the 2020–2024 ACS period, Monmouth, Oregon had a total population of 11,428, the 56th largest city in Oregon, with a median household income of $69,170, which is 17% lower than the state average. The poverty rate is 16.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Monmouth Quick Facts
How Monmouth Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 11,176 | 11,428 | +2.3% |
| Median household income | $66,858 | $69,170 | +3.5% |
| Median home value | $380,500 | $413,200 | +8.6% |
How Monmouth Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 46 | National average: 61
Education
Educational Attainment (Adults 25+)
Monmouth Rankings in Oregon
Explore Oregon Rankings
Other Cities in Polk County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Dallas | 17,531 | $71,549 | 15.5% | $389,100 |
| Independence | 10,199 | $85,375 | 12.5% | $378,800 |
| Falls City | 1,222 | $51,250 | 19.8% | $302,900 |
| Rickreall | 52 | N/A | 26.9% | N/A |
Cities Similar to Monmouth
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Prineville | 11,470 | $72,980 | $425,900 | 16.3% | 16.2% |
| Fairview | 10,735 | $70,107 | $427,700 | 24.0% | 17.5% |
| White City | 10,750 | $71,175 | $302,400 | 10.6% | 14.3% |
| Astoria | 10,109 | $68,007 | $444,800 | 31.3% | 16.8% |
| Newport | 10,583 | $60,568 | $441,400 | 31.3% | 16.2% |
Population Overview
Monmouth is a small city located in Oregon, within Polk County. The total population is 11,428. It ranks as the 56th most populous out of 420 Census-designated places in Oregon.
Age Demographics
The median age in Monmouth is 27.1 years. This is 33% lower than the state median of 40.4 years.
Economy, Income & Housing
The median household income in Monmouth is $69,170. This is 17% lower than the state median of $83,011. It is also 14% lower than the national median of $80,734. The poverty rate stands at 16.1%. This is 35% higher than the state poverty rate of 11.9%. The unemployment rate is 7.1%. This is 32% higher than the state rate of 5.4%. The median home value is $413,200. Housing costs are 13% lower than the state median of $477,600. The home-value-to-income ratio is 6.0x. 47.4% of occupied housing units are owner-occupied. This homeownership rate is 25% lower than the state average of 63.3%.
Race & Ethnicity
The largest racial or ethnic group in Monmouth is White (non-Hispanic), making up 70.2% of the population. Hispanic or Latino residents account for 19.9%. The Asian population (1.8%) is well below the state average of 4.4%.
Education
27.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 26% lower than the state rate of 36.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.7%.
Data Sources & Methodology
All demographic data for Monmouth, Oregon is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Oregon state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 420 Census-designated places in Oregon. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
Free data download: Get all Oregon city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Monmouth, Oregon?
Monmouth, Oregon has a population of 11,428 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Monmouth, OR?
The median household income in Monmouth is $69,170, which is 14% lower than the national median of $80,734.
What is the poverty rate in Monmouth, OR?
The poverty rate in Monmouth is 16.1%. This means approximately 1,614 residents live below the federal poverty line.
What is the racial makeup of Monmouth, Oregon?
Monmouth's population is 70.2% White, 1.2% Black, 19.9% Hispanic/Latino, and 1.8% Asian.
What is the median home value in Monmouth, OR?
The median home value in Monmouth is $413,200. The home-value-to-income ratio is 6.0x.
How educated is Monmouth, Oregon?
27.3% of adults (25+) in Monmouth hold a bachelor's degree or higher, and 10.6% hold a graduate or professional degree.