Get ready-to-use data, reports, analysis, and visualizations covering the demographics of Cumberland County, Maine based on the current United States Census Bureau's 2023 American Community Survey (ACS) 5-Year Estimates.
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Cumberland County, Maine Demographics: Sex by Age

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the total population of Cumberland County, Maine is 305,940. The median age of the population in Cumberland County, Maine is 42.1. The median age for males is 41.0 years, and for females, it is 43.6 years.
The age distribution of the population in Cumberland County, Maine is as follows:
- Under 5 years: 4.70%
- 5–17 years (children): 13.54%
- 18–24 years (young adults): 8.32%
- 25–34 years: 13.66%
- 35–54 years: 25.73%
- 55–64 years: 14.23%
- 65 years and over (seniors): 19.82%
The total dependency ratio in Cumberland County, Maine is 61.43%. The youth dependency ratio is 29.43%, and the old-age dependency ratio is 32.00%. In demographic terms, the dependency ratio measures the size of the population typically not in the labor force (children and older adults) relative to those of working age.
Cumberland County, Maine Demographics: Population by Race & Ethnicity

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the population in Cumberland County, Maine by race and ethnicity (racial demographics) is as follows:
- White: 86.70%
- Black/African American: 3.23%
- American Indian and Alaska Native: 0.14%
- Asian: 2.11%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.38%
- Two or more races: 4.71%
- Hispanic or Latino: 2.71%
The diversity index score in Cumberland County, Maine is 24.38%, suggesting a low level of diversity.
Cumberland County, Maine Demographics: Household Income

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Cumberland County, Maine over the past 12 months, adjusted for 2023 inflation, was $92,983.
The distribution of household income by income bracket in Cumberland County, Maine is as follows:
- Less than $20,000: 8.22%
- $20,000–$34,999: 8.48%
- $35,000–$49,999: 9.41%
- $50,000–$74,999: 14.91%
- $75,000–$149,999: 32.37%
- $150,000 or more: 26.61%
Cumberland County, Maine Demographics: Educational Attainment

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the total population of Cumberland County, Maine, age 25 and older, by educational level is as follows:
- Less than high school graduate: 3.50%
- High school graduate (incl. equivalency): 20.24%
- Some college or associate's degree: 24.10%
- Bachelor's Degree: 31.16%
- Graduate or professional degree: 21.01%
In Cumberland County, Maine, 52.16% of the population has a bachelor's degree or higher, while 96.50% are high school graduates or higher.
Cumberland County, Maine Demographics: Health Insurance Coverage Status by Sex by Age

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the uninsured rate in Cumberland County, Maine is 4.70%.
Rates of people in Cumberland County, Maine lacking health insurance coverage, by age group and sex are as follows:
- Under 18: 3.09% of males and 1.83% of females are uninsured
- Ages 18–34: 5.47% of males and 3.93% of females are uninsured
- Ages 35–64: 8.35% of males and 6.19% of females are uninsured
- Ages 65 and older: 0.02% of males and 2.17% of females are uninsured
Cumberland County, Maine Demographics: Nativity and Citizenship Status in the United States

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 96.83% of people living in Cumberland County, Maine are U.S. citizens. This includes individuals born in the United States, Puerto Rico, or U.S. Island Areas, those born abroad to American parents, and those who became citizens through naturalization. 3.29% of the population obtained U.S. citizenship through the naturalization process. In Cumberland County, Maine, 3.29% of the population are naturalized immigrants, who obtained U.S. citizenship through the immigration and naturalization process.
Cumberland County, Maine Demographics: Means of Transportation to Work

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the means of transportation to work for the population of Cumberland County, Maine are distributed as follows:
- Car, truck, or van: 72.89%
- Public transportation (excluding taxicab): 0.98%
- Bicycle: 0.52%
- Walked: 5.06%
- Taxicab, motorcycle, or other means: 1.19%
- Worked from home: 19.36%
Frequently Asked Questions
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the age breakdown of the population of Cumberland County, Maine is as follows:
- Under 5: 4.70%
- Ages 5–17: 13.54%
- Ages 18–24: 8.32%
- Ages 25–34: 13.66%
- Ages 35–54: 25.73%
- Ages 55–64: 14.23%
- 65 or older: 19.82%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the racial demographics of the population of Cumberland County, Maine are as follows:
- White: 86.70%
- Black/African American: 3.23%
- American Indian and Alaska Native: 0.14%
- Asian: 2.11%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.38%
- Two or more races: 4.71%
- Hispanic or Latino: 2.71%
* Hispanic includes respondents of any race. Other categories are non-Hispanic.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the distribution of household income in Cumberland County, Maine by income bracket is as follows:
- Less than $20,000: 8.22%
- $20,000–$34,999: 8.48%
- $35,000–$49,999: 9.41%
- $50,000–$74,999: 14.91%
- $75,000–$149,999: 32.37%
- $150,000 or more: 26.61%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Cumberland County, Maine in the past 12 months, in 2023 inflation-adjusted dollars, was $92,983.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 86.70% of the population in Cumberland County, Maine identifies as White alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 3.23% of the population in Cumberland County, Maine identifies as Black or African American alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 4.70% of the population of Cumberland County, Maine lacks health insurance coverage.
The detailed breakdown by age and sex is as follows:
- Under 18: 3.09% of males and 1.83% of females
- Ages 18–34: 5.47% of males and 3.93% of females
- Ages 35–64: 8.35% of males and 6.19% of females
- Ages 65 and over: 0.02% of males and 2.17% of females