Penobscot County's 2026 population is estimated at 157,862, reflecting a 0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Penobscot County is the 3rd largest county in Maine. The 2010 population was 153,864 and has grown 2.6% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.5 years
Female: 43.9 years
Male: 41.1 years
There are 127,461 adults, (31,088 of whom are seniors) in Penobscot County.
Female: 77,861 (50.3%)
Male: 76,849 (49.7%)
The racial composition of Penobscot County includes 91.78% White, and smaller percentages for Black or African American, Asian, Native American, other race, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 141,988 | 91.78% |
| Two or more races | 6,483 | 4.19% |
| Black or African American | 1,803 | 1.17% |
| Asian | 1,696 | 1.1% |
| Native American | 1,330 | 0.86% |
| Other race | 1,328 | 0.86% |
| Native Hawaiian or Pacific Islander | 82 | 0.05% |
Penobscot County 's average per capita income is $46,621. Household income levels show a median of $66,356. The poverty rate stands at 14.1%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $103,273 | $123,009 |
| Families | $91,546 | $110,241 |
| Households | $66,356 | $88,290 |
| Non Families | $37,938 | $51,348 |
Average Income
Median Household Income
Poverty Rate
