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Maine
Statistics on children, youth and families in Maine from the Annie E. Casey Foundation and the Maine Children's Alliance
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Why This Indicator Matters
These age groups, ages 18 to 24 and ages 25 to 64 represent the young adult and adult workforce population in Maine. Having an overall count by age group and county also helps understand issues of access and service use by county.
Between 2020 and 2025, the young adult population of Maine, ages 18 to 24, increased by 9,360 individuals or 9%. Adults ages 25 to 64 also increased in population by 1% or 5,239 more people.
At the county level, comparing 2020 to 2025, thirteen counties experienced growth for young adult ages 18 to 24. Androscoggin led with the most individuals and highest percent change at +27% and 2,532. In terms of percent population change, next was Hancock (+18%, 632), Kennebec (+17%, 1,757), Piscataquis (+11%, 113), and Cumberland (+9%, 2,280). By contrast, Knox (-4%, -96), Aroostook (-3%, -169) and Franklin (-3%, -81) declined in the population of young adults.
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Between 2020 and 2025, the young adult population of Maine, ages 18 to 24, increased by 9,360 individuals or 9%. Adults ages 25 to 64 also increased in population by 1% or 5,239 more people.
At the county level, comparing 2020 to 2025, thirteen counties experienced growth for young adult ages 18 to 24. Androscoggin led with the most individuals and highest percent change at +27% and 2,532. In terms of percent population change, next was Hancock (+18%, 632), Kennebec (+17%, 1,757), Piscataquis (+11%, 113), and Cumberland (+9%, 2,280). By contrast, Knox (-4%, -96), Aroostook (-3%, -169) and Franklin (-3%, -81) declined in the population of young adults.
Definition and Source
PROVIDER
Definition
The number of individuals ages 18 to 24 and the number ages 25 to 64.
Data Source
Maine Department of Health and Human Services, Office of Data, Research and Vital Statistics.
2025 Data Uploaded 8/26/2026
2025 Data Uploaded 8/26/2026
Last Updated
August 2026