How many people live in Kennebec County, ME?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 128,500 people living in Kennebec County, ME. That makes Kennebec County the fourth-most populous county in Maine. It is home to 9.1% of people living in the state.
128K
population of Kennebec County, ME (2024)
9.1%
County share of the Maine population (2024)
About 128,500 people lived in Kennebec County, ME in 2024.
Population estimates, 2000–2024
What are Kennebec County, ME’s age demographics?
About 28,400 Kennebec County residents are aged 65 and older in 2024. That represents 22.1% of its population. For comparison, the age group represents 23.5% of Maine’s population and 18% in the US overall.
Another 23,400 Kennebec County residents, or 18.2% of the population, were children under 18. For comparison, the age group represents 17.6% of Maine’s population and 21.6% in the US overall.
A higher share of Kennebec County, ME's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Kennebec County, ME’s racial and ethnic demographics?
Non-Hispanic white residents make up 92.9% of the Kennebec County, ME population, higher than the national share of 57.5%.
In contrast, Kennebec County’s Hispanic population accounts for 2.4%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.91% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Kennebec County, ME has a higher share of a non-Hispanic white population than Maine as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Kennebec County, ME is Augusta with about 19,200 residents in 2024.
Cities and towns in Kennebec County, ME ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Augusta | 19,168 |
| 2. | Waterville | 17,336 |
| 3. | Winslow | 8,072 |
| 4. | Oakland | 6,351 |
| 5. | Winthrop | 6,187 |
| 6. | Gardiner | 6,160 |
| 7. | Sidney | 4,904 |
| 8. | Vassalboro | 4,653 |
| 9. | China | 4,599 |
| 10. | Monmouth | 4,236 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
