Date:
On June 25, 2026, the U.S. Census Bureau released official population estimates by age, sex, race, and Hispanic origin reflecting changes from July 1, 2024, to July 1, 2025. This latest release completes the 2025 population estimate series, providing detailed demographic breakouts beyond the total population numbers previously released.
The estimates show that Maine continues to be the oldest state in the country with a median age of 44.9 years. Interestingly, it’s also the only state where the median age actually dropped between 2000 and 2025 – though that figure changes quite a bit from county to county. The data also shows increasing racial and ethnic diversity in Maine’s population in 2025. Explore Maine’s population estimates by age, sex, race and Ethnicity in our interactive dashboard tool, which contains data state and county level data from this 2025 Population Estimates data release.
Key takeaways for Maine:
- Maine remains the nation's oldest state, with a median age of 44.9 years in 2025 – though it's also the only state where median age has dropped since 2020, narrowing the gap with the national median (39.4 years).
- The median age in Maine’s counties ranged from 40.4 years in Androscoggin County to 52.9 years in Lincoln County. See the map below for a county-by-county breakdown.
- Population change was positive for all race groups during the year, but there were differences in percentage growth.
- Maine’s population is becoming more racially and ethnically diverse, similar to overall nationwide trends. Figure 2 shows both how fast each population group changed and the real number of people that change represents.
About the Population Estimates
Population estimates are produced annually by the U.S. Census Bureau and are the official and most accurate source of population statistics at the national, state, county and town levels. The estimates are based on the population as of July 1 each year.
Other population data are available from the U.S. Census Bureau, including from the Decennial (10-year) Census, and the American Community Survey. Relative to these other sources, population estimates are most useful when having up-to-date data is more important than precision and/or when it has been several years since the last Decennial Census (2020). Population estimates are available at the nation, state, metropolitan statistical area, county, and city/town levels.
Dashboard/Tool Updates
Underlying data in the Build Your Own Datasheet tool and Population Estimates by Population Group dashboard have been updated with the 2025 annual population estimates data.