Monmouth, ME demographics:
population, income, and more

Total population
3,925
1.5% year-over-year change
Median household income
$63,712/yr
-8.1% year-over-year change
Housing units
2,080
-1.6% year-over-year change

Monmouth population

How many people live in Monmouth

Monmouth is home to 3,925 residents, according to the most recent Census data. Gender-wise, 54.4% of Monmouth locals are male, and 45.6% are female.

Total population
3,925
1.5% year-over-year change
Gender ratio
Male
54.4%
2,137
Female
45.6%
1,789
Value Percent YoY change
Male 2,137 54.4% 0.3%
Female 1,789 45.6% 2.9%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Monmouth is 47, with the population distributed as follows: about 14.9% are children under 15, then 7.7% are in the 15 to 24 age group. Adults between 25 and 44 make up 22.2% of the population, while another 37.2% fall into the 45 to 64 bracket. Finally, around 18% are 65 or older.

Median age
47
Age breakdown
Under 15
14.9%
15 to 24
7.7%
25 to 44
22.2%
45 to 64
37.2%
Over 65
18%
Value Percent YoY change
Under 15 585 14.9% 14.3%
15 to 24 302 7.7% -27.4%
25 to 44 872 22.2% 16.9%
45 to 64 1,459 37.2% -1.8%
Over 65 707 18% -0.1%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Monmouth, 96.3% of the population are US-born citizens, while 3.7% have gained naturalized citizenship. There’s also a share of 4.4% that includes residents with two or more races.

Citizenship
U.S.-born citizens
96.3%
Non-U.S.-born citizens
3.7%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 3,781 96.3% 1.8%
Non-U.S.-born citizens 144 3.7% -6.5%
Racial breakdown
White
94.9%
Black or African American
0.7%
American Indian and Alaska Native
0%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
4.4%
Other
0%
Value Percent
White 3,725 94.9%
Black or African American 27 0.7%
Two or more races 173 4.4%

Households in Monmouth

A peek inside Monmouth households

Monmouth has 1,672 households, with an average of 2 members in each. Of these, 69% are families, while the remaining 31% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,672
-0.8% year-over-year change
Average people per household
2
Non-family households
518
Family households
1,154
Value Percent YoY change
Non-family households 518 31% -12.3%
Family households 1,154 69% 5.5%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Monmouth

The housing landscape of Monmouth

Monmouth's housing consists of 2,080 units, with 71.1% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 0.4% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 20% of the housing landscape.

Housing units
2,080
-1.6% year-over-year change
Housing types
Value Percent
1 unit, detached 1,479 71.1%
1 unit, attached 9 0.4%
2 units 91 4.4%
3 or 4 units 59 2.8%
5 to 9 units 11 0.5%
10 to 19 units 14 0.7%
Mobile home 416 20%
Homes built since 2020
7
% year-over-year change

The age of buildings in Monmouth

In Monmouth, the median construction year is 1986. About 16.3% of homes were built before the 1940s, with another 3.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 21.4% of homes were added from 2000 to 2009, 9.7% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 339 16.3% 5.6%
Built between 1940 and 1949 69 3.3% -5.5%
Built between 1950 and 1959 100 4.8% 5.3%
Built between 1960 and 1969 129 6.2% -2.3%
Built between 1970 and 1979 211 10.1% -11.7%
Built between 1980 and 1989 336 16.2% -20.8%
Built between 1990 and 1999 243 11.7% 143.0%
Built between 2000 and 2009 446 21.4% -9.7%
Built between 2010 and 2019 201 9.7% -15.6%
Built in 2020 or later 7 0.3% N/A
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Monmouth occupancy rates

Out of the 1,672 occupied housing units in Monmouth, 79.2% are owner-occupied, while 20.8% are lived in by tenants. Meanwhile, 19.6% of all homes on the local market sit vacant.

Occupied housing units
1,672
-0.8% year-over-year change
Occupancy breakdown
Renter occupied
347
Owner occupied
1,325
Value Percent YoY
change
Renter occupied 347 20.8% 5.8%
Owner occupied 1,325 79.2% -2.4%
Unoccupied housing units
19.6%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Monmouth housing costs

Housing costs in Monmouth come to a median of $939 per month, while tenants specifically pay a median gross rent of $1,328.

Median housing costs per month
$939/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Monmouth
$1,328/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Monmouth

Monmouth education at a glance

About 37% of the population in Monmouth went to high school, while 17.2% pursued college studies. Another 9.6% earned an associate degree and 16.4% hold a bachelor’s. Meanwhile, 16.2% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 121 3.8% 63.5%
High school diploma 1,172 37% 5.3%
College diploma 544 17.2% -7.2%
Associate degree 303 9.6% -7.3%
Bachelor's degree 519 16.4% 2.0%
Graduate degree 513 16.2% -4.3%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Monmouth

How much people earn in Monmouth

The average annual household income in Monmouth was $89,127 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -6.4% change from the previous year. At the same time, the median income stood at $63,712, reflecting a -8% shift over the same period.

Average household income in Monmouth
$89,127/year
-6.4% year-over-year change
Median household income in Monmouth
$63,712/year
-8.1% year-over-year change

Monmouth income by age

In Monmouth, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $116,529. Those with someone between 45 and 64 in charge, often well established professionally, earn $58,210 overall. Overall, 91.1% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $116,529 27.0%
45 - 64 $58,210 -18.2%
Over 65 $49,696 3.6%
Above poverty level
3,554
Below poverty level
349
Value Percent YoY
change
Above poverty level 3,554 91.1% -2.5%
Below poverty level 349 8.9% 86.6%

Employment in Monmouth

Workforce and job types in Monmouth

74.1% of the working population are employed in professional or administrative positions, while 25.9% are in hands-on or service-based jobs. Also, 14.7% run their own businesses, 59.1% are employed by private companies, and 15.7% work in the public sector.

Workforce demographics

White collar
1,560
Blue collar
545
Value Percent YoY change
White collar 1,560 74.1% -7.4%
Blue collar 545 25.9% -16.4%
Employer type
Self employees
14.7%
Private companies
59.1%
Governmental workers
15.7%
Not for profit companies
10.4%
Value Percent YoY change
Self employees 310 14.7% -8.0%
Private companies 1,245 59.1% -11.3%
Governmental workers 331 15.7% -13.3%
Not for profit companies 219 10.4% 2.3%

Transportation in Monmouth

How people get around in Monmouth

Commuting methods vary: 99.1% of residents travel by personal vehicle and 0.9% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 1,601 99.1% -13.5%
Walk 14 0.9% N/A
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Monmouth by zipcode?

Zipcode Population Number of households Median income Average income
04259 3,610 1,492 $83,919 $94,814
04265 552 307 $43,506 $50,799

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FAQs about Monmouth demographics 

What is the total population of Monmouth?

Monmouth has a total population of 3,925 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.5% compared to a year ago.

What is the gender ratio in Monmouth?

The gender ratio in Monmouth is as follows:
  • 54.4% males (2,137 residents)
  • 45.6% females (1,789 residents)

What is the median age in Monmouth?

The median age in Monmouth is 47.

What is the age distribution of the population in Monmouth?

The age distribution in Monmouth is as follows:
  • Under 15: 14.9% (585 residents)
  • Ages 15-24: 7.7% (302 residents)
  • Ages 25-44: 22.2% (872 residents)
  • Ages 45-64: 37.2% (1,459 residents)
  • Over 65: 18% (707 residents)

What is the racial and ethnic makeup of Monmouth?

The racial and ethnic makeup of Monmouth is as follows:
  • White: 94.9% (3,725 residents)
  • Black or African American: 0.7% (27 residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 0% ( residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 4.4% (173 residents)
  • Other: 0% ( residents)

What percentage of the population in Monmouth are U.S.-born citizens?

U.S.-born citizens represent 96.3% of the population in Monmouth.

How many housing units are there in Monmouth?

There are 2,080 housing units in Monmouth, reflecting a -1.6% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Monmouth and what is the average household size?

Monmouth has a total of 1,672 households, with an average of 2 people in each.

What is the median household income in Monmouth?

Monmouth has a median household income of $63,712, representing a -8.1% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Monmouth?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 74.1% (1,560 residents)
  • Blue-collar workers: 25.9% (545 residents)

Places of employment:
  • Self-employed: 14.7% (310 residents)
  • Private companies: 59.1% (1,245 residents)
  • Governmental workers: 15.7% (331 residents)
  • Not-for-profit companies: 10.4% (219 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025