Monmouth

County:: Kennebec County
County Seat:: No
Area (mi²):: 34.013
State:: Maine

Monmouth is located in Kennebec County, Maine. Monmouth has a 2025 population of 4,266. Monmouth is currently growing at a rate of 0.73% annually and its population has increased by 4.41% since the most recent census, which recorded a population of 4,086 in 2020.

The average household income in Monmouth is $92,667 with a poverty rate of 5.44%. The median age in Monmouth is 46.6 years: 46.6 years for males, and 46.6 years for females.

Demographics

The racial composition of Monmouth includes 93.72% White, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	3,878	93.72%
Two or more races	234	5.65%
Black or African American	26	0.63%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Monmouth Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Monmouth's average per capita income is $45,951. Household income levels show a median of $80,778. The poverty rate stands at 5.44%.

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	$114,769	-
Families	$112,597	$110,644
Households	$80,778	$92,667
Non Families	$28,186	$59,559

$45,951

Average Income

$80,778

Median Household Income

5.44%

Poverty Rate