Kennebec County's 2026 population is estimated at 129,511, reflecting a 0.41% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Kennebec County is the 4th largest county in Maine. The 2010 population was 122,074 and has grown 6.09% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.7 years
Female: 44.7 years
Male: 42.2 years
There are 103,069 adults, (26,806 of whom are seniors) in Kennebec County.
Female: 64,771 (51.1%)
Male: 62,037 (48.9%)
The racial composition of Kennebec County includes 92.41% White, and smaller percentages for Asian, Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 117,182 | 92.41% |
| Two or more races | 6,261 | 4.94% |
| Asian | 1,129 | 0.89% |
| Black or African American | 1,083 | 0.85% |
| Other race | 875 | 0.69% |
| Native American | 277 | 0.22% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Kennebec County 's average per capita income is $49,450. Household income levels show a median of $69,077. The poverty rate stands at 11.63%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $106,482 | $120,761 |
| Families | $89,070 | $106,335 |
| Households | $69,077 | $88,742 |
| Non Families | $40,647 | $55,141 |
Average Income
Median Household Income
Poverty Rate
