Monmouth, Oregon Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Monmouth, Oregon is 11,176 as of the 2023 American Community Survey, making it the 56th-largest city in Oregon. The median household income is $66,858, the median home value is $380,500, and the median age is 26.2.
The population has grown 22.0% since 2010 (9,548 → 11,651).
11,176
Population
4992
People / sq mi
$66,858
Median Income
$380,500
Median Home Value
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Monmouth covers 2.2 sq mi of land at 4992 people per square mile.
About Monmouth, OR
Age is the most distinctive thing about Monmouth: a median age of 26.2, younger than the national median. Monmouth is a city in Oregon with a population of 11,176.
The typical household here earns about $66,858, below the US median of $78,538. Poverty runs at 5.4%, below the national 12.4%. The typical home is valued at $380,500, with typical rent around $1,137.
27.9% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Around 10.7% of workers work from home, below the national 14.0%, and the average commute runs about 24 minutes each way.
Monmouth city Population History (2010-2024)
The city of Monmouth city had a population of 9,548 in 2010 and 11,651 in 2024, a 22.0% growth over 14 years. The peak was 11,651 in 2024. Average annual growth rate: 1.44%.
11,651
Population (2024)
9,548
Population (2010)
11,651
Peak (2024)
1.44%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,548 |
| 2011 | 9,727 |
| 2012 | 9,788 |
| 2013 | 9,812 |
| 2014 | 9,791 |
| 2015 | 9,873 |
| 2016 | 10,144 |
| 2017 | 10,338 |
| 2018 | 10,469 |
| 2019 | 10,586 |
| 2020 | 11,144 |
| 2021 | 11,260 |
| 2022 | 11,522 |
| 2023 | 11,575 |
| 2024 | 11,651 |
Race & Ethnicity
| White | 79.0% |
| Black or African American | 1.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 8.8% |
| Two or More Races | 0.3% |
Economy & Income
$66,858
Median Household Income
$28,060
Per Capita Income
5.4%
Poverty Rate
4.2%
Unemployment Rate
Housing
$380,500
Median Home Value
$1,137
Median Rent
45.5%
Owner-Occupied
Education
94.6%
High School+
27.9%
Bachelor's+
Commute
1.0%
Drive Alone
70.3%
Public Transit
10.7%
Work From Home
23.8 min
Avg Commute
Community Profile
40.4%
Foreign Born
85.6%
Non-English at Home
9.0%
Veterans
17.9%
With Disability
96.7%
Health Insurance
95.6%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 36.8% |
| Education, Health Care & Social Services | 11.0% |
| Public Administration | 6.1% |
| Construction | 5.0% |
| Finance, Insurance & Real Estate | 4.3% |
| Agriculture & Mining | 3.5% |
| Arts, Entertainment & Food Services | 3.4% |
| Manufacturing | 3.0% |
| Retail Trade | 2.6% |
| Information | 1.6% |
| Transportation & Warehousing | 0.2% |
Largest cities in Oregon
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Frequently Asked Questions
Monmouth, Oregon has a population of 11,176 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 56th-largest city in Oregon.
The median household income in Monmouth, Oregon is $66,858, with 5.4% of residents living below the federal poverty level.
The median home value in Monmouth, Oregon is $380,500, with median monthly rent at $1,137 and a homeownership rate of 45.5%.
The median age in Monmouth, Oregon is 26.2 years. The population is 48.7% male and 51.3% female.
The population has grown 22.0% since 2010 (9,548 → 11,651).
Monmouth city, OR Climate
Monmouth city, OR has an average annual temperature of 11.4°C (53°F) and receives about 1159 mm of precipitation per year. The warmest month is August and the coldest is December. Figures are 1970–2000 climate normals.
11.4°C
Avg Temp
1159
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 5° / 40° | 183 mm |
| February | 6° / 43° | 146 mm |
| March | 8° / 47° | 130 mm |
| April | 10° / 50° | 73 mm |
| May | 13° / 55° | 51 mm |
| June | 16° / 61° | 33 mm |
| July | 19° / 66° | 14 mm |
| August | 19° / 67° | 18 mm |
| September | 17° / 62° | 38 mm |
| October | 12° / 54° | 82 mm |
| November | 7° / 45° | 183 mm |
| December | 5° / 40° | 208 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Monmouth city, OR
The most comfortable months to visit Monmouth city, OR are typically July, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 28°C high). The coldest is December (near 1°C low). December is usually the wettest month.
Where to stay near Monmouth
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Statewide data for Oregon
Population, race, income, age, and trends across Oregon
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.