Cumberland County, Maine Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 1st-largest in Maine

The population of Cumberland County, Maine is 305,940 as of the 2023 American Community Survey, making it the 1st-largest county in Maine. The median household income is $92,983, the median home value is $411,400, and the median age is 42.1.

The population of Cumberland County has grown 11.5% since 2010 (281,481 → 313,809), a +0.78% annualized rate.

Cumberland County within Maine · Source: US Census TIGER/Line via us-atlas

305,940

Population

+0.78%

Annual growth

366

People / sq mi

$92,983

Median Income

$411,400

Median Home Value

Cumberland County covers 836 sq mi of land at 365.9 people per square mile.

About Cumberland County, ME

Cumberland County is a county in Maine with a population of 305,940. It ranks #1 among counties in Maine by population. The median age is 42.1, older than the national median. The population is 48.7% male and 51.3% female.

The median household income in Cumberland County is $92,983, above the US median of $74,580. 3.4% of residents live below the federal poverty level. Home values sit at a median of $411,400, with monthly rent averaging $1,492. The homeownership rate of 70.4% is higher than the national rate of 64.8%.

Educational attainment in Cumberland County reflects 52.2% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 19.4% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 23.4 minutes each way.

Cumberland County Population History (2010-2024)

The county of Cumberland County had a population of 281,481 in 2010 and 313,809 in 2024, a 11.5% growth over 14 years. The peak was 313,809 in 2024. Average annual growth rate: 0.78%.

313,809

Population (2024)

281,481

Population (2010)

313,809

Peak (2024)

0.78%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	281,481	-	-	estimate
2011	282,753	+1,272	+0.45%	estimate
2012	283,742	+989	+0.35%	estimate
2013	285,681	+1,939	+0.68%	estimate
2014	288,274	+2,593	+0.91%	estimate
2015	289,704	+1,430	+0.50%	estimate
2016	291,522	+1,818	+0.63%	estimate
2017	292,549	+1,027	+0.35%	estimate
2018	294,363	+1,814	+0.62%	estimate
2019	296,052	+1,689	+0.57%	estimate
2020	303,606	+7,554	+2.55%	estimate
2021	306,152	+2,546	+0.84%	estimate
2022	309,309	+3,157	+1.03%	estimate
2023	311,258	+1,949	+0.63%	estimate
2024	313,809	+2,551	+0.82%	estimate

Race & Ethnicity

White	87.6%
Black or African American	3.3%
Asian	0.0%
Hispanic or Latino (any race)	1.0%
Two or More Races	0.0%

Age & Sex

42.1

Median Age

51.3%

Female

48.7%

Male

19.9%

Age 65+

Age Distribution

Under 5

4.7%

5–9

5.0%

10–14

5.2%

15–19

5.7%

20–24

5.9%

25–34

13.7%

35–44

13.1%

45–54

12.6%

55–59

6.8%

60–64

7.4%

65–74

11.8%

75–84

5.9%

85+

2.2%

Children (under 15): 14.9% · Seniors (65+): 19.9%

Income & Poverty

Median household income	$92,983+$21,210 vs state
Mean household income	$125,434
Per-capita income	$54,238
Poverty rate	3.4%-3.1% vs state
Unemployment rate	2.2%
Employment-to-population	65.7%

Top Industries by Employment

Professional & business services

27.5%

Finance & real estate

13.8%

Information

8.9%

Education & health care

8.5%

Manufacturing

8.1%

Construction

5.8%

Arts, entertainment & food

4.0%

Retail trade

3.7%

The largest employment sector in Cumberland County is professional & business services, accounting for 27.5% of workers.

How residents commute

1.0%

Drive alone

5.1%

Carpool

65.6%

Public transit

19.4%

Work from home

23.4 min

Avg commute

Housing

$411,400+$145,000 vs state

Median home value

$1,492

Median rent

70.4%

Homeownership rate

151,519

Total housing units

85.8%

Occupied

14.2%

Vacant

29.6%

Renter-occupied

Social & access

95.3%

With health insurance

95.6%

With broadband internet

38.9%

Foreign-born

6.7%

Veterans (18+)

11.3%

With a disability

92.6%

Speak language other than English at home

Education

96.5%

High School+

52.2%

Bachelor's+

Largest cities in Maine

Portland (68,505)Lewiston (37,886)Bangor (31,663)South Portland (26,780)Auburn (24,294)Biddeford (22,463)Sanford (22,095)Saco (20,636)Westbrook (20,484)Augusta (18,999)All Maine cities →

Other counties in Maine

York County (214,731)Penobscot County (153,571)Kennebec County (125,614)Androscoggin County (112,323)Aroostook County (67,227)Oxford County (58,728)Hancock County (56,084)Somerset County (50,852)Knox County (40,860)Waldo County (40,006)All Maine counties →

Part of Maine

Maine demographic profile All Maine data →

Metro areas in Maine

Portland (557,764)Bangor (153,571)Lewiston (112,323)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Cumberland County, Maine has a population of 305,940 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 1st-largest county in Maine. Population density is 366 people per square mile.

The population of Cumberland County has grown 11.5% since 2010 (281,481 → 313,809), a +0.78% annualized rate.

The median household income in Cumberland County, Maine is $92,983, with mean (average) household income of $125,434 and per-capita income of $54,238. 3.4% of residents live below the federal poverty level.

In Cumberland County, the largest racial and ethnic groups are White (87.6%), Black or African American (3.3%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Cumberland County, Maine is 42.1 years. Residents are 51.3% female and 48.7% male.

The median home value in Cumberland County is $411,400 and median monthly rent is $1,492. 70.4% of occupied housing units are owner-occupied. The county has 151,519 total housing units, 14.2% of which are vacant.

The largest employment sector in Cumberland County, Maine is professional, scientific, and management services, employing 27.5% of workers. The unemployment rate is 2.2%.

Portland is among the largest cities associated with Cumberland County, Maine, with a population of 68,505.