Monmouth ZIP Code List — Kennebec County, ME

There is one unique ZIP code in Monmouth, Maine and it is 04259. Area code: 207.

ZIP codes

29.01

sq mi land

4.70

sq mi water

207

area code

Monmouth, ME ZIP code map

About Monmouth, ME

Monmouth, located in the state of Maine, is a charming town in Kennebec County. This small community is known for its rich history and vibrant local culture. With a strong sense of community and family-friendly atmosphere, Monmouth offers a delightful place for both residents and visitors.

Location & geography

Monmouth is situated in the heart of Maine, providing a picturesque landscape that features both woods and water. It is approximately 23 miles to the northwest of the state capital, Augusta, and about 30 miles northeast of Lewiston. The town encompasses a land area of 29.01 square miles and a water area of 4.70 square miles, which includes several lakes and streams, enhancing its natural beauty.

Community & economy

The character of Monmouth is largely shaped by its tight-knit community where residents often engage in local events and activities. The local economy is supported by various industries, including agriculture, retail, and tourism, which highlights the area's scenic attractions such as the historic Monmouth Academy. Daily life in Monmouth is characterized by outdoor recreational opportunities, community gatherings, and a strong commitment to preserving its historical heritage.

Transportation

Major roads such as Route 135 and Route 202 connect Monmouth to surrounding areas and facilitate easy travel to nearby cities. The nearest airport is Augusta State Airport, which serves as a small regional airport for general aviation. Public transportation options are limited, so personal vehicles are the primary mode of transit.

History

Monmouth was founded in 1771 and was originally settled for its fertile land and water resources. Throughout its history, the town has been known for its agricultural industries and education, with Monmouth Academy being a notable historic institution. Key events in its past include its incorporation in 1820 and ongoing community efforts to promote cultural and educational initiatives.

Did you know?

One surprising fact about Monmouth is that it is home to The Gull Nest, a renowned local store that attracts visitors seeking unique gifts and local products. Additionally, Monmouth has a scenic lake named Lake Minnehonk, which becomes a popular spot for swimming and fishing during the summer months.

ZIP codes for Monmouth, ME (1)

ZIP code	City	County	Map
04259	Monmouth	Kennebec	View map

Demographics & statistics

3,410

Population

46.3

Median age

$78,864

Median household income

$39,521

Per capita income

$232,900

Median home value

$978

Median monthly rent

77.0%

Home ownership

7.4%

Poverty rate

2.5%

Unemployment

1,538

Housing units

35.0%

Bachelor's or higher

Age distribution

Male Female

Under 5

110

5–9

10–14

125

15–19

109

20–24

168

25–34

146

227

35–44

196

398

45–54

345

171

55–59

148

139

60–64

121

226

65–74

195

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	615	18.0%
18 and over	2,795	82.0%
65 and over	566	16.6%
Median age	46.3 years

Race & ethnicity

White 89.3%

Two or more races 6.8%

Hispanic or Latino 2.8%

Asian 0.5%

American Indian / Alaska Native 0.3%

Black or African American 0.3%

Group	Count	%
White	3,135	89.3%
Two or more races	237	6.8%
Hispanic or Latino	99	2.8%
Asian	16	0.5%
American Indian / Alaska Native	12	0.3%
Black or African American	10	0.3%

Household income

Under $10k 3.4%

$10k–$15k 2.4%

$15k–$25k 14.0%

$25k–$35k 5.0%

$35k–$50k 7.8%

$50k–$75k 14.6%

$75k–$100k 10.9%

$100k–$150k 31.5%

$150k–$200k 6.7%

$200k+ 3.6%

Range	% of households
Under $10k	3.4%
$10k–$15k	2.4%
$15k–$25k	14.0%
$25k–$35k	5.0%
$35k–$50k	7.8%
$50k–$75k	14.6%
$75k–$100k	10.9%
$100k–$150k	31.5%
$150k–$200k	6.7%
$200k+	3.6%
Median income	$78,864

Housing

Home values

Under $50k 10.1%

$50k–$100k 5.1%

$100k–$150k 9.8%

$150k–$200k 9.2%

$200k–$300k 32.6%

$300k–$500k 26.5%

$500k–$1M 6.7%

Housing overview

Metric	Value
Median home value	$232,900
Median rent / month	$978
Owner occupied	77.0%
Renter occupied	23.0%
Vacant	20.7%
Single-family detached	73.9%
Large apartment buildings	1.1%
Mobile homes	16.1%
Median rooms	5.3
Avg household size (owned)	2.31

Year built

Era	%
2020 or later	0.0%
2010–2019	7.7%
2000–2009	25.1%
1990–1999	2.0%
1980–1989	20.9%
1970–1979	14.3%
1960–1969	6.1%
1950–1959	4.6%
1940–1949	4.7%
1939 or earlier	14.7%

Bedrooms

Size	% of units
No bedroom (studio)	3.3%
1 bedroom	3.7%
2 bedrooms	30.2%
3 bedrooms	48.0%
4 bedrooms	12.6%
5+ bedrooms	2.2%

Vehicles per household

Vehicles	% of households
No vehicle	1.1%
1 vehicle	33.3%
2 vehicles	41.3%
3 or more	24.3%

Heating fuel

Fuel type	%
Electricity	2.5%
Propane / LP gas	12.9%
Fuel oil	64.3%
Wood	15.3%

Households & families

Household type	Count	%
Married-couple family	764	51.3%
Cohabiting couple	119	8.0%
Male householder, no spouse	350	23.5%
Female householder, no spouse	257	17.2%
Households with children under 18	398	26.7%
Households with seniors (65+)	437	29.3%
Average household size	2.28

Marital status

Status	Male	Female
Never married	21.1%	21.7%
Married	53.8%	59.6%
Separated	0.0%	0.0%
Widowed	5.0%	3.7%
Divorced	20.1%	15.0%

Education

Less than 9th grade 2.3%

Some HS, no diploma 2.8%

HS graduate 29.2%

Some college, no degree 19.5%

Associate's degree 11.2%

Bachelor's degree 16.2%

Graduate / professional 18.7%

Metric	%
HS diploma or higher	94.9%
Bachelor's or higher	35.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	10	1.7%
Kindergarten	80	13.3%
Elementary school	248	41.2%
High school	191	31.7%
College / grad school	73	12.1%

Employment

Industry of employment

Education & healthcare 29.9%

Retail trade 19.6%

Public administration 9.8%

Manufacturing 9.6%

Finance & real estate 8.6%

Construction 8.4%

Professional & management 4.3%

Agriculture & mining 2.8%

Other services 2.4%

Arts, food & hospitality 1.4%

Transportation & utilities 1.2%

Wholesale trade 1.1%

Information 0.8%

Occupation

Category	%
Management, business & arts	46.7%
Service	4.1%
Sales & office	23.7%
Natural resources & construction	12.4%
Production & transportation	13.1%

Employment type

Type	%
Private sector	74.4%
Government	16.6%
Self-employed	9.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	73.9%
Carpool	8.6%
Public transit	0.0%
Walk	0.0%
Other means	0.3%
Avg commute (minutes)	32.3

Poverty

All people 7.4%

Under 18 years 9.0%

18 and over 7.1%

Married-couple families 1.3%

Female-led households 0.0%

Income support

Source	% of households
Social Security	27.5%
Retirement income	24.9%
Supplemental Security	1.4%
Cash public assistance	3.0%
Food stamps / SNAP	7.7%

Health indicators

Condition	%
High blood pressure	32.1%
High cholesterol	32.1%
Heart disease	6.8%
Stroke	2.9%
Asthma	11.2%
Arthritis	27.2%
Kidney disease	2.8%
Pulmonary disease	8.6%
Cancer	6.6%

Behavior / access	%
Binge drinking	16.3%
No physical activity	22.1%
Less than 7 hrs sleep	30.5%
Fair or poor health	13.2%
Poor mental health	14.8%
Poor physical health	10.4%
No health insurance	12.6%
Visited doctor (checkup)	78.8%
Visited dentist	66.1%
Cholesterol screening	88.8%
Teeth loss	16.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	293	10.5%

Disability	%
Any disability	8.1%
Under 18	4.2%
18–64 years	3.7%
65 and over	29.3%

Health insurance coverage

Type	%
Private insurance	78.8%
Public insurance	27.4%
Uninsured under 19	3.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,289	96.5%
Spanish	7	0.2%
Other Indo-European	0	0.0%
Asian & Pacific Islander	7	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,381	99.1%
Born in same state	3,284	96.3%
Born in different state	2,578	75.6%
Foreign born	97	2.8%
Naturalized citizen	29	0.9%
Not a US citizen	29	100.0%

Ancestry

Ancestry	Count	%
German	496	14.5%
French	436	12.8%
Arab	344	10.1%
Italian	328	9.6%

Ancestry	Count	%
English	267	7.8%
Irish	36	1.1%
Polish	14	0.4%
Norwegian	14	0.4%

Technology access

Metric	% of households
Computer access	43.7%
Internet access	97.7%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for Monmouth, ME?

Monmouth, ME has one ZIP code: 04259.

What is the main ZIP code for Monmouth, ME?

The primary ZIP code for Monmouth, ME is 04259. The city uses area code 207 for phone service.

What county is Monmouth, ME in?

Monmouth is located in Kennebec County, Maine.

How many ZIP codes are in Monmouth, ME?

Monmouth, ME has 1 ZIP code.

What ZIP code should I use when mailing something to downtown Monmouth near the town center?

Downtown Monmouth, including the town center and main business district, uses the ZIP code 04259.

What is the ZIP code for the Monmouth Academy area in Monmouth, Maine?

Monmouth Academy, the local independent school, is located in ZIP code 04259, which covers the entire town of Monmouth.