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
Remote work is unusually prominent in Kennebec County: 13.8% of workers primarily work from home, above the 14.0% national rate. With 125,614 residents, Kennebec County is a county in Maine. That makes it one of the ten largest counties in Maine in the country, at #4 by population.
Household earnings are middling, with a median of $65,062 — below the US median of $78,538. The poverty rate is 7.3%, below the national 12.4%. The typical home is valued at $219,900, with typical rent around $952.
Educational attainment is on the higher side for US counties — 30.9% of adults hold a four-year degree, below the national 35.0%. Remote work is on the higher side at 13.8%, close to the national 14.0%, and the average commute runs about 24 minutes each way.
The remote-work concentration is telling in Kennebec County — it skews toward higher-income, college-educated workers and reshapes both commute patterns and housing demand.
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.
Kennebec County, ME Climate
Kennebec County, ME has an average annual temperature of 6.7°C (44°F) and receives about 1080 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
6.7°C
Avg Temp
1080
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -8° / 17° | 79 mm |
| February | -6° / 20° | 68 mm |
| March | -1° / 30° | 90 mm |
| April | 5° / 42° | 93 mm |
| May | 12° / 54° | 94 mm |
| June | 17° / 63° | 94 mm |
| July | 20° / 69° | 86 mm |
| August | 19° / 67° | 90 mm |
| September | 15° / 58° | 86 mm |
| October | 9° / 47° | 99 mm |
| November | 3° / 37° | 106 mm |
| December | -4° / 24° | 95 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Kennebec County, ME
The most comfortable months to visit Kennebec County, ME are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 26°C high). The coldest is January (near -14°C low). November is usually the wettest month.
Where to stay near Kennebec County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.