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 and multiracial populations.

Population by 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%

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