Nantucket County, Massachusetts
Located in Massachusetts, Nantucket County has a population of 14,483 residents and a median age of 42.4 years, making it the #2,187 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 3.2%. The median home value is $1.6M, and the median household income is $139,688, which is 86% above the national median.
Demographics
Nantucket County has a population of 14,483, making it the #2,187 most populous county in the US. The median age is 42.4 years, which is 9.0% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Nantucket County is $139,688, ranking #16 out of 3,222 counties — 85.9% above the national median. The poverty rate is 3.2% and unemployment stands at 4.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Nantucket County is $1.6M (+465.4% vs national). Renters pay a median of $2,213/mo and the homeownership rate is 71.8%.
Median Home Value Trend
Rankings →Household Type
Education
In Nantucket County, 56.3% of adults age 25+ hold a bachelor's degree or higher, which is 67.1% above the national average, ranking #47 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Nantucket County is 82.8 years. 10.9% of adults report poor or fair health and 3.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
9.2% of adults in Nantucket County smoke , 28.3% are obese , and 23.2% report excessive drinking. The drug overdose death rate is 24.8 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 13.9 per 100,000.
Families & Children
6.6% of children in Nantucket County live in poverty . The teen birth rate is 8.4 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Nantucket County is 87.3%. The mean commute time is 17.3 min, which is 37.5% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Nantucket County voted Democratic with a margin of 36.9%. The vote was 67.6% Dem / 30.7% Rep. Compared to 2020, the margin shifted 8.6 toward Republicans .
Vote Share Over Time
About Nantucket County, Massachusetts
Nantucket County, Massachusetts has a total population of 14,483, making it the 2,187th most populous county in the United States. The median age in Nantucket County is 42.4 years, which is 9.0% above the national median of 38.9 years.
The median household income in Nantucket County is $139,688, which ranks #16 of 3,222 counties nationwide. This is 85.9% above the national median of $75,149. The poverty rate is 3.2%, lower than the national rate of 12.6%. The unemployment rate stands at 4.3%.
The median home value in Nantucket County is $1.6M, 465.4% above the national median. Renters in Nantucket County pay a median gross rent of $2,213 per month. The homeownership rate is 71.8%, compared to the national rate of 64.4%.
In Nantucket County, 56.3% of residents aged 25 and older hold a bachelor's degree or higher, 67.1% above the national average of 33.7%. Health insurance coverage stands at 92.2% of the population. The average commute time for workers is 17.3 min.
Nantucket County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 68.2% of the population, followed by Hispanic or Latino (17.0%) and Black (non-Hispanic) (9.4%).
All data for Nantucket County, Massachusetts comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.