Kennebec County, Maine Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Maine
The population of Kennebec County, Maine is 125,614 as of the 2023 American Community Survey, making it the 4th-largest county in Maine. The median household income is $65,062, the median home value is $219,900, and the median age is 44.0.
The population of Kennebec County has grown 5.2% since 2010 (122,074 → 128,461), a +0.36% annualized rate.
125,614
Population
+0.36%
Annual growth
145
People / sq mi
$65,062
Median Income
$219,900
Median Home Value
Kennebec County covers 867 sq mi of land at 144.8 people per square mile.
About Kennebec County, ME
Kennebec County is a county in Maine with a population of 125,614. It ranks #4 among counties in Maine by population. The median age is 44.0, older than the national median. The population is 48.9% male and 51.1% female.
The median household income in Kennebec County is $65,062, below the US median of $74,580. 7.3% of residents live below the federal poverty level. Home values sit at a median of $219,900, with monthly rent averaging $952. The homeownership rate of 72.8% is higher than the national rate of 64.8%.
Educational attainment in Kennebec County reflects 30.9% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 13.8% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 23.8 minutes each way.
Kennebec County Population History (2010-2024)
The county of Kennebec County had a population of 122,074 in 2010 and 128,461 in 2024, a 5.2% growth over 14 years. The peak was 128,461 in 2024. Average annual growth rate: 0.37%.
128,461
Population (2024)
122,074
Population (2010)
128,461
Peak (2024)
0.37%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 122,074 |
| 2011 | 121,801 |
| 2012 | 121,610 |
| 2013 | 121,167 |
| 2014 | 121,277 |
| 2015 | 121,063 |
| 2016 | 121,538 |
| 2017 | 121,970 |
| 2018 | 122,086 |
| 2019 | 122,241 |
| 2020 | 124,723 |
| 2021 | 125,775 |
| 2022 | 127,143 |
| 2023 | 127,936 |
| 2024 | 128,461 |
Race & Ethnicity
| White | 93.4% |
| Black or African American | 0.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.0% |
Age & Sex
44.0
Median Age
51.1%
Female
48.9%
Male
20.8%
Age 65+
Age Distribution
Children (under 15): 15.5% · Seniors (65+): 20.8%
Income & Poverty
| Median household income | $65,062$-6,711 vs state |
| Mean household income | $85,256 |
| Per-capita income | $37,344 |
| Poverty rate | 7.3%+0.8% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 58.3% |
Top Industries by Employment
The largest employment sector in Kennebec County is professional & business services, accounting for 29.5% of workers.
How residents commute
0.1%
Drive alone
2.6%
Carpool
75.1%
Public transit
13.8%
Work from home
23.8 min
Avg commute
Housing
$219,900$-46,500 vs state
Median home value
$952
Median rent
72.8%
Homeownership rate
63,140
Total housing units
85.4%
Occupied
14.6%
Vacant
27.2%
Renter-occupied
Social & access
93.3%
With health insurance
94.1%
With broadband internet
26.9%
Foreign-born
9.8%
Veterans (18+)
16.4%
With a disability
95.2%
Speak language other than English at home
Education
94.8%
High School+
30.9%
Bachelor's+
Largest cities in Maine
Other counties in Maine
Part of Maine
Metro areas in Maine
County rankings
Frequently Asked Questions
Kennebec County, Maine has a population of 125,614 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Maine. Population density is 145 people per square mile.
The population of Kennebec County has grown 5.2% since 2010 (122,074 → 128,461), a +0.36% annualized rate.
The median household income in Kennebec County, Maine is $65,062, with mean (average) household income of $85,256 and per-capita income of $37,344. 7.3% of residents live below the federal poverty level.
In Kennebec County, the largest racial and ethnic groups are White (93.4%), Hispanic or Latino (1.6%), Black or African American (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Kennebec County, Maine is 44.0 years. Residents are 51.1% female and 48.9% male.
The median home value in Kennebec County is $219,900 and median monthly rent is $952. 72.8% of occupied housing units are owner-occupied. The county has 63,140 total housing units, 14.6% of which are vacant.
The largest employment sector in Kennebec County, Maine is professional, scientific, and management services, employing 29.5% of workers. The unemployment rate is 2.5%.
Portland is among the largest cities associated with Kennebec County, Maine, with a population of 68,505.
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Full rankings of Maine counties
Statewide data for Maine
Population, race, income, age, and trends across Maine
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.