Monmouth, Oregon Population 2021

10,820
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Monmouth is a city located in Polk County Oregon. With a 2020 population of 10,820, it is the 48th largest city in Oregon and the 2935th largest city in the United States . Monmouth is currently growing at a rate of 1.09% annually and its population has increased by 13.49% since the most recent census, which recorded a population of 9,534 in 2010. Monmouth reached it's highest population of 10,820 in 2021. Spanning over 2 miles, Monmouth has a population density of 4,979 people per square mile.

The average household income in Monmouth is $52,511 with a poverty rate of 27.80%. The median rental costs in recent years comes to $1,014 per month, and the median house value is $225,100. The median age in Monmouth is 23.6 years, 23.5 years for males, and 23.9 years for females.

Monmouth Demographics

According to the most recent ACS, the racial composition of Monmouth was:

  • White: 79.89%
  • Two or more races: 5.71%
  • Other race: 5.37%
  • Asian: 4.30%
  • Black or African American: 3.24%
  • Native American: 0.79%
  • Native Hawaiian or Pacific Islander: 0.71%
The current population of Monmouth, Oregon is 10,820 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 10,469.The last official US Census in 2010 recorded the population at 9,534.

Monmouth, Oregon Population 2021

Population by Race

Race Population Percentage
White8,21479.89%
Two or More Races5875.71%
Some Other Race5525.37%
Asian4424.30%
Black or African American3333.24%
American Indian and Alaska Native810.79%
Native Hawaiian and Other Pacific Islander730.71%
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Monmouth Population by Race

Monmouth Population Pyramid $2021

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Monmouth Median Age

23.6


Total

23.5


Male

23.9


Female

Monmouth Adults

There are 8,286 adults, (914 of whom are seniors) in Monmouth.

Monmouth Age Dependency

39.5

Age Dependency Ratio

12.4

Old Age Dependency Ratio

27.1

Child Dependency Ratio

Monmouth Sex Ratio

Female

4,970

48.34%

Male

5,312

51.66%

Monmouth Population by Age

Monmouth Renter vs Owner Occupied by Household Type

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Monmouth Household Types

Type Owner Renter
Female67.3%32.7%
Married63.2%36.8%
Male50.9%49.1%
All42.9%57.1%
Non Family17.5%82.5%

42.9%

Rate of Home Ownership

Monmouth Households and Families

Type Count Average Size Owned
All3,3152.7842.9
Non Family1,4711.8317.5
Married1,4663.5563.2
Female2723.5967.3
Male1063.150.9

3.41

Average Family Size

2.78

Average Household Size

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Monmouth Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1723.72%
9th to 12th Grade3317.15%
High School Graduate87018.80%
Some College96320.81%
Associates Degree60313.03%
Bachelors Degree1,11424.08%
Graduate Degree57412.41%
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Monmouth Educational Attainment by Sex (over 25)

Monmouth Educational Attainment by Race

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Race Total High School Bachelors
White3,5603,4001,345
Hispanic59430154
Other Race32927612
2+ Races162155119
Asian124102102
Black1047662
Native American6565
Islander886

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 82.26%.

Monmouth Educational Attainment by Race

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Name Average Male Female
Overall$30,333$38,383$22,712
Less Than 9th Grade$21,223$27,273$16,352
High School Graduate$29,402$32,344$22,868
Some College$24,709$27,037$23,638
Bachelors Degree$35,489$39,399$21,111
Graduate Degree$47,245$73,864$45,167

$30,333

Average Earnings

$38,383

Average Male

$22,712

Average Female

Monmouth Earnings by Educational Attainment

Monmouth Language by Age

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Monmouth Language

78.09% of Monmouth residents speak only English, while 21.91% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.36% of the population.

Monmouth Language

Monmouth Poverty by Race

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Name Total In Poverty Poverty Rate
White6,4921,53423.63%
Asian38330078.33%
Black32224977.33%
Hispanic1,54421714.05%
Multiple38019751.84%
Other5446111.21%
Islander665380.30%
Native781316.67%

27.80%

Overall Poverty Rate

27.59%

Male Poverty Rate

28.04%

Female Poverty Rate

Poverty in Monmouth

The race most likely to be in poverty in Monmouth is Islander, with 80.30% below the poverty level.

The race least likely to be in poverty in Monmouth is Other, with 11.21% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 9.35%. Among those working part-time, it was 40.53%, and for those that did not work, the poverty rate was 31.55%.

Monmouth Poverty

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Name Poverty
Less Than 9th Grade31.21%
Some College17.82%
Bachelors or Greater17.25%
High School13.91%

Monmouth Poverty Rate by Education

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Rate Poverty
Female Employed31.67%
Male Unemployed26.67%
Male Employed21.27%
Female Unemployed18.29%

Monmouth Poverty Rate by Employment Status and Sex

Monmouth Income by Household Type

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Name Median Mean
Households$39,704$52,511
Families$61,250$67,301
Married Families$64,914-
Non Families$25,159$29,330
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Income by Household Type

Monmouth Marital Status

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Marriage Rates

34.5%

Overall Marriage Rate

33.2%

Male Marriage Rate

35.9%

Female Marriage Rate

Monmouth Married by Age and Sex

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Monmouth Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Monmouth Marital Status by Race

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Monmouth Marital Status

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438

Number of Veterans

408

Male Veterans

30

Female Veterans

War Veterans
Vietnam142
First Gulf War103
Second Gulf War98
World War II37
Korea26

Monmouth Veterans by War

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Age Group Veterans
65 to 74118
35 to 5499
75+83
18 to 3479
55 to 6459

Monmouth Veterans by Age

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Name Veterans % of Total
White3775.66%
Native American5280.00%
Asian92.65%
Hispanic50.43%

Monmouth Veterans by Race

Monmouth Veterans by Education

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5.02%

Veteran Poverty Rate

28.77%

Veteran Disability Rate

Monmouth Veterans by Education

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60.5%

Labor Force Participation

57.4%

Employment Rate

5.1%

Unemployment Rate

Monmouth Employment by Age

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Monmouth Employment by Race

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Monmouth Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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51.90%

Born in Monmouth

85.97%

Native Born

14.03%

Foreign Born

10.19%

Non Citizen

3.84%

Naturalized

Place of Birth

85.97% of Monmouth residents were born in the United States, with 51.90% having been born in Oregon. 10.19% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Monmouth Place of Birth

Year Population Growth Annual Growth Rate
202110,8201171.09%
202010,7031171.11%
201910,5861171.12%
201810,4691311.27%
201710,3381941.91%
201610,1442712.74%
20159,873820.84%
20149,791-21-0.21%
20139,812240.25%
20129,788610.63%
20119,7271791.87%
20109,5481,8072.12%
20007,7411,4532.10%
19906,2886941.18%
19805,5943570.66%
19705,2373,0088.92%
19602,2292731.32%
19501,9569917.32%
1940965590.63%
19309063244.53%
1920582891.67%
1910493-113-2.04%
19006063394.18%
18802670.00%

Monmouth Population by Year