Barnstable County's 2026 population is estimated at 232,192, reflecting a -0.08% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Barnstable County is the 9th largest county in Massachusetts. The 2010 population was 215,909 and has grown 7.54% since 2010.
Data after 2023 is projected based on recent change
Overall: 55.4 years
Female: 56.7 years
Male: 52.9 years
There are 198,964 adults, (76,755 of whom are seniors) in Barnstable County.
Female: 120,129 (51.9%)
Male: 111,539 (48.1%)
The racial composition of Barnstable County includes 85.82% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 198,817 | 85.82% |
| Two or more races | 16,406 | 7.08% |
| Black or African American | 6,467 | 2.79% |
| Other race | 5,531 | 2.39% |
| Asian | 3,422 | 1.48% |
| Native American | 1,025 | 0.44% |
Barnstable County 's average per capita income is $59,063. Household income levels show a median of $95,241. The poverty rate stands at 7.67%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $139,276 | $183,536 |
| Families | $124,710 | $166,816 |
| Households | $95,241 | $134,349 |
| Non Families | $55,199 | $78,698 |
Average Income
Median Household Income
Poverty Rate