Nantucket County, Massachusetts
Nantucket County, Massachusetts, has 14,758 residents (July 2025 estimate). Its county seat is Nantucket. It uses Eastern Time and covers 46.2 sq mi (120 km²) of land.
- Resident population, July 2025
- 14,758
- Land area
- 46.2 sq mi (120 km²)
- County seat or government
- Nantucket
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $139,688 ± $16,786
- Median home value
- $1,593,800 ± $149,009
- Median rent, with utilities
- $2,213 ± $628
- Homes lived in by their owners
- 71.8% ± 5.3 points
- County type
- County
- Metro or micro area
- Nantucket, MA micro areaCentral county
- Water area
- 257 sq mi (667 km²)
- State
- Massachusetts
- County code (FIPS)
- 25019
- Coordinates (central point)
- 41.293392, -70.102164
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Nantucket County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
3 ZIP Code areas overlap Nantucket County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Towns in Nantucket County, largest first
- Town of Nantucket14,483 people
People counts are American Community Survey 2020–2024 5-year estimates. All towns in Massachusetts, by county
School districts in Nantucket County, largest first
- Nantucket School District14,483 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Nantucket, Massachusetts (CDP)10,017 people
- Madaket, Massachusetts (CDP)377 people
- Siasconset, Massachusetts (CDP)204 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Dukes County, Massachusetts32 mi west
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