Somerset County, Maine Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 9th-largest in Maine
The population of Somerset County, Maine is 50,852 as of the 2023 American Community Survey, making it the 9th-largest county in Maine. The median household income is $56,199, the median home value is $155,200, and the median age is 46.9.
The population of Somerset County has declined 1.7% since 2010 (52,217 → 51,338), a -0.12% annualized rate.
50,852
Population
-0.12%
Annual growth
13
People / sq mi
$56,199
Median Income
$155,200
Median Home Value
Somerset County covers 3,924 sq mi of land at 13.0 people per square mile.
About Somerset County, ME
Somerset County skews on age — the median resident is 46.9, older than the national median. With 50,852 residents, Somerset County is a county in Maine. That makes it one of the ten largest counties in Maine in the country, at #9 by population.
Incomes run on the lower side: a median household income of $56,199, below the US median of $78,538. Poverty runs at 10.7%, below the national 12.4%. Median home value is $155,200, with typical rent around $887.
20.3% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Remote work is below the national 14.0% at 10.1%, and the average commute runs about 28 minutes each way.
The age structure shapes everything downstream in Somerset County — from housing demand to the mix of working-age earners reflected in the income figures above.
Somerset County Population History (2010-2024)
The county of Somerset County had a population of 52,217 in 2010 and 51,338 in 2024, a -1.7% growth over 14 years. The peak was 52,217 in 2010. Average annual growth rate: -0.12%.
51,338
Population (2024)
52,217
Population (2010)
52,217
Peak (2010)
-0.12%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 52,217 |
| 2011 | 51,937 |
| 2012 | 51,821 |
| 2013 | 51,715 |
| 2014 | 51,254 |
| 2015 | 50,749 |
| 2016 | 50,562 |
| 2017 | 50,373 |
| 2018 | 50,568 |
| 2019 | 50,729 |
| 2020 | 50,473 |
| 2021 | 50,788 |
| 2022 | 51,027 |
| 2023 | 51,171 |
| 2024 | 51,338 |
Race & Ethnicity
| White | 95.1% |
| Black or African American | 0.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.4% |
| Two or More Races | 0.0% |
Age & Sex
46.9
Median Age
50.2%
Female
49.8%
Male
22.6%
Age 65+
Age Distribution
Children (under 15): 15.1% · Seniors (65+): 22.6%
Income & Poverty
| Median household income | $56,199$-15,574 vs state |
| Mean household income | $72,900 |
| Per-capita income | $32,452 |
| Poverty rate | 10.7%+4.2% vs state |
| Unemployment rate | 2.2% |
| Employment-to-population | 53.3% |
Top Industries by Employment
The largest employment sector in Somerset County is professional & business services, accounting for 24.3% of workers.
How residents commute
0.1%
Drive alone
2.3%
Carpool
77.0%
Public transit
10.1%
Work from home
27.6 min
Avg commute
Housing
$155,200$-111,200 vs state
Median home value
$887
Median rent
77.3%
Homeownership rate
30,009
Total housing units
75.8%
Occupied
24.2%
Vacant
22.7%
Renter-occupied
Social & access
92.2%
With health insurance
92.2%
With broadband internet
27.1%
Foreign-born
11.0%
Veterans (18+)
18.9%
With a disability
97.8%
Speak language other than English at home
Education
92.9%
High School+
20.3%
Bachelor's+
Largest cities in Maine
Other counties in Maine
Part of Maine
Metro areas in Maine
County rankings
Frequently Asked Questions
Somerset County, Maine has a population of 50,852 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 9th-largest county in Maine. Population density is 13 people per square mile.
The population of Somerset County has declined 1.7% since 2010 (52,217 → 51,338), a -0.12% annualized rate.
The median household income in Somerset County, Maine is $56,199, with mean (average) household income of $72,900 and per-capita income of $32,452. 10.7% of residents live below the federal poverty level.
In Somerset County, the largest racial and ethnic groups are White (95.1%), Hispanic or Latino (1.4%), Black or African American (0.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Somerset County, Maine is 46.9 years. Residents are 50.2% female and 49.8% male.
The median home value in Somerset County is $155,200 and median monthly rent is $887. 77.3% of occupied housing units are owner-occupied. The county has 30,009 total housing units, 24.2% of which are vacant.
The largest employment sector in Somerset County, Maine is professional, scientific, and management services, employing 24.3% of workers. The unemployment rate is 2.2%.
Portland is among the largest cities associated with Somerset County, Maine, with a population of 68,505.
Somerset County, ME Climate
Somerset County, ME has an average annual temperature of 3.4°C (38°F) and receives about 1047 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
3.4°C
Avg Temp
1047
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -12° / 10° | 70 mm |
| February | -11° / 12° | 61 mm |
| March | -5° / 22° | 71 mm |
| April | 2° / 35° | 80 mm |
| May | 9° / 49° | 87 mm |
| June | 15° / 58° | 100 mm |
| July | 18° / 64° | 104 mm |
| August | 17° / 62° | 101 mm |
| September | 12° / 53° | 93 mm |
| October | 6° / 42° | 87 mm |
| November | 0° / 31° | 104 mm |
| December | -8° / 17° | 89 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 Somerset County, ME
The most comfortable months to visit Somerset County, ME are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 24°C high). The coldest is January (near -18°C low). July is usually the wettest month.
Where to stay near Somerset County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.