Nantucket County's 2026 population is estimated at 14,942, reflecting a 0.92% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Nantucket County is the 14th largest county in Massachusetts. The 2010 population was 10,165 and has grown 46.99% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.4 years
Female: 42.2 years
Male: 42.5 years
There are 11,508 adults, (2,327 of whom are seniors) in Nantucket County.
Female: 6,933 (47.9%)
Male: 7,550 (52.1%)
The racial composition of Nantucket County includes 69.67% White, 9.47% Black or African American, 6.65% other race, and smaller percentages for Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 10,090 | 69.67% |
| Two or more races | 1,799 | 12.42% |
| Black or African American | 1,372 | 9.47% |
| Other race | 963 | 6.65% |
| Asian | 251 | 1.73% |
| Native American | 8 | 0.06% |
Nantucket County 's average per capita income is $72,774. Household income levels show a median of $139,688. The poverty rate stands at 3.16%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $168,184 | - |
| Families | $154,777 | $206,082 |
| Households | $139,688 | $205,560 |
| Non Families | $74,596 | $176,728 |
Average Income
Median Household Income
Poverty Rate