PlainZIP

Monmouth, ME · standard

ZIP Code 04259

Kennebec County, Maine - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

3,264
43/sq mi
$83,919
Median income
$298,300
Median home value
34.6%
Bachelor's or higher

The verdict

Monmouth pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.

Top 33%
household income, US ZIPs
Top 34%
home value, US ZIPs
43
people per sq mi
78%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 04259 against every reporting US ZIP.

ZIP code 04259 covers 76.1 square miles in Monmouth, Kennebec County, Maine (a standard USPS delivery area), with a modest 3,264 residents on file, a density of 43 people per square mile, in the New York time zone.

ZIP 04259 lands in the middle-income range, with a median household income of $83,919 (14% above the Maine average), while per-capita income is $40,324. Poverty here runs at 8.1%, with unemployment measured at 0.1%. On housing, the median home value is $298,300 (5% above the state average) with median rent at $1,249 per month, and 78.0% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 34.6% of adults hold a bachelor's degree or higher, the median age is 46, and the average commute is 29 minutes. To put 04259 in local context, 9 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Kennebec County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 04259

Top 5 sectors by establishment count in Monmouth, ME

Which industries have the most business establishments in ZIP 04259.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 04259, Monmouth, ME · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

3,264

Population

76.1

Area (sq mi)

43

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 04259?

46.0

Median Age

54.4%

Male

45.6%

Female

1.7%

Foreign-Born

White 95.2%
African American 0.7%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.1%
Hispanic or Latino 1.8%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$83,919

Median Household Income

+14% vs state

$40,324

Per Capita Income

8.1%

Poverty Rate

0.1%

Unemployment Rate

28.7 min

Mean Commute Time

How ZIP 04259 ranks nationally

Monmouth, ME household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$83,919 Top 33% higher than 67% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 70.2%
Bachelor's Degree or Higher 34.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

1,890

Total Housing Units

1,492

Occupied Units

398

Vacant Units

2.40

Avg Household Size

Occupancy Type

Owner 78.0%
Renter 22.0%

$298,300

Median Home Value

+5% vs state

$1,249

Median Rent

1986

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+29.0%

YoY Change (2024)

338

HPI Index (2000 = 100)

+238%

Total Change Since 2000

Home values in ZIP 04259 have increased 29.0% over the past year (2024). Since 2000, this ZIP has seen +238% cumulative appreciation.

Year Annual Change HPI Index
2020 +8.6% 185
2021 +20.5% 223
2022 +11.9% 250
2023 +4.8% 262
2024 +29.0% 338

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 63 business establishments in ZIP 04259, employing approximately 279 people with a combined annual payroll of $16,179,000.

63

Businesses

279

Employees

$16.2M

Annual Payroll

8

Industry Sectors

Industry Establishments % of Total
Construction 18 28.6%
Retail trade 11 17.5%
Professional, scientific, and technical services 7 11.1%
Other services (except public administration) 6 9.5%
Manufacturing 3 4.8%
Administrative and support and waste management and remediation services 3 4.8%
Health care and social assistance 3 4.8%
Accommodation and food services 3 4.8%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 04259 vs 04265 →

ZIP 04259 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 04259 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 04259 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 04259 ranks #7 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
04265 North Monmouth, ME 918 4.3 mi
04364 Winthrop, ME 6,025 6.2 mi
04350 Litchfield, ME 3,577 5.7 mi
04280 Sabattus, ME 6,474 7.8 mi
04236 Greene, ME 4,350 7.2 mi
04284 Wayne, ME 1,138 9.0 mi
04263 Leeds, ME 2,326 7.6 mi
04343 East Winthrop, ME 25 9.0 mi
04351 Manchester, ME 2,571 10.2 mi

More ZIP Codes in Kennebec County

04901 standard
Waterville, ME
Pop: 26,248
04330 standard
Augusta, ME
Pop: 26,086
04345 standard
Gardiner, ME
Pop: 11,646
04963 standard
Oakland, ME
Pop: 7,238
04364 standard
Winthrop, ME
Pop: 6,025
04358 standard
South China, ME
Pop: 4,276

Related Areas

Kennebec County Monmouth, ME Maine

Frequently Asked Questions

What county is ZIP code 04259 in? ▼
ZIP code 04259 (Monmouth) is located in Kennebec County, Maine. Kennebec County contains multiple ZIP codes, see the full list at /counties/kennebec-me.
What is the population of ZIP code 04259? ▼
ZIP code 04259 in Monmouth, ME has a population of 3,264 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 04259? ▼
The median household income in ZIP 04259 is $83,919, which is 10% above the national average of $76,288.
What is the average home value in ZIP 04259? ▼
The median home value in ZIP 04259 is $298,300, which is 7% above the national average of $278,155.
What is the demographic makeup of ZIP 04259? ▼
The largest racial group in ZIP 04259 is White at 95.2%. Hispanic or Latino residents make up 1.8% of the population.
How many businesses are in ZIP code 04259? ▼
ZIP code 04259 has 63 business establishments employing approximately 279 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 04259? ▼
The top industries by establishment count in ZIP 04259 are: Construction (18), Retail trade (11), Professional, scientific, and technical services (7). There are 8 industry sectors represented in total.
How have home values changed in ZIP code 04259? ▼
According to the FHFA House Price Index, home values in ZIP 04259 increased by 29.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 238%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 04259? ▼
In ZIP code 04259, 70.2% of residents aged 25+ have a high school diploma or higher, and 34.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 04259? ▼
The mean commute time for workers in ZIP code 04259 is 28.7 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 04259? ▼
In ZIP code 04259, approximately 78.0% of occupied housing units are owner-occupied and 22.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 04259? ▼
The poverty rate in ZIP code 04259 is 8.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.