04259 ZIP Code — Monmouth, ME
Kennebec County, Maine
ZIP code 04259 is located in Monmouth, Maine, within Kennebec County. It covers approximately 29.01 square miles and serves a population of 3,410 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 207.
About ZIP code 04259
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $232,900. Owner-occupancy is high at 77%, well above the national average.
Median household income is $78,864. The poverty rate of 7% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.
Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.
Health indicators show elevated rates of smoking (20%) compared to national benchmarks.
3,410
population
29.01
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
04259 ZIP code map
Cities in ZIP code 04259
Below are the cities the US Postal Service accepts for ZIP code 04259. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Monmouth | Preferred |
Nearby ZIP codes
04265 North Monmouth (3.6 mi)
04350 Litchfield (5.3 mi)
04364 Winthrop (6.4 mi)
04280 Sabattus (7 mi)
04236 Greene (7.3 mi)
04263 Leeds (7.8 mi)
04284 Wayne (8.4 mi)
04351 Manchester (10 mi)
04345 Gardiner (10.3 mi)
04347 Hallowell (10.4 mi)
04357 Richmond (11.3 mi)
04287 Bowdoin (11.7 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 3,410 |
| Population density | 118 / sq mi |
| State FIPS | 23 |
| County FIPS | 011 |
| Geography | |
|---|---|
| Land area | 29.01 sq mi |
| Water area | 4.70 sq mi |
| Latitude | 44.2245 |
| Longitude | -70.0064 |
| Timezone | Eastern (ET) |
| Area code | 207 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 41.4% | 45.7% | 42.3% |
| $50k – $100k | 34.9% | 32.0% | 32.3% |
| $100k – $200k | 22.1% | 18.4% | 20.6% |
| Over $200k | 1.5% | 3.8% | 4.9% |
Demographics & statistics
3,410
Population
118
People per sq mi
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
65
Under 5
56
110
5–9
95
74
10–14
65
125
15–19
109
46
20–24
40
168
25–34
146
227
35–44
196
398
45–54
345
171
55–59
148
139
60–64
121
226
65–74
195
59
75–84
51
19
85+
16
← 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
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 41.4% | 45.7% | 42.3% |
| $50k – $100k | 34.9% | 32.0% | 32.3% |
| $100k – $200k | 22.1% | 18.4% | 20.6% |
| Over $200k | 1.5% | 3.8% | 4.9% |
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% |
| Work from home | 17.2% |
| 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 | % |
|---|---|
| Obesity | 35.9% |
| High blood pressure | 32.1% |
| High cholesterol | 32.1% |
| Diabetes | 10.0% |
| 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 | % |
|---|---|
| Smoking | 20.4% |
| Binge drinking | 16.3% |
| No physical activity | 22.1% |
| Less than 7 hrs sleep | 30.5% |
| Depression | 24.1% |
| 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% |
| No insurance | 7.9% |
| 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 about ZIP code 04259
What city is ZIP code 04259 in?
ZIP code 04259 is primarily assigned to Monmouth, Maine.
What county is ZIP code 04259 in?
ZIP code 04259 falls within Kennebec County, Maine.
Does ZIP code 04259 have a large veteran population?
11% of civilians in ZIP code 04259 are veterans, above the national average of ~7%.
What is the population of ZIP code 04259?
ZIP code 04259 has an estimated population of 3,410 residents, with a density of 118 people per square mile.
What is the typical home value in ZIP code 04259?
The median home value in ZIP code 04259 is $232,900.
What is the median household income in ZIP code 04259?
The median household income in ZIP code 04259 is $78,864, above the national median of ~$75,000.
What timezone is ZIP code 04259 in?
ZIP code 04259 observes the EST timezone.