| ZIP Codes: | 3 ZIP Codes (1 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 508 / 774 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:27 PM |
| Population: | 14,483 [See All] |
| FIPS: | 25019 |
| CBSA: | Nantucket, MA |
| Land Area: | 49 sq mi |
| Water Area: | 17 sq mi |
| Coordinates: | 41.2843, -70.0235 |
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14,483 residents live across 3 ZIPs covering 49 sq mi, served by 2 distinct USPS-recognized cities.
Population moved from 10,414 to 14,483 from 2014 to 2024 — a +39.1% change. 3 ZIPs gained residents, 0 lost.
The county's wealthiest ZIP 02554 (Nantucket, $140,938 median) and poorest ZIP 02554 (Nantucket, $140,938) are 0.0 miles apart — a 1.0× income gap across local geography.
Median home values vary 1.0× across this county — from $1,595,700 in 02554 (Nantucket) to $1,652,200 in 02564 (Siasconset ).
Educational attainment ranges from 56.2% bachelor's+ in 02554 (Nantucket) to 65.7% in 02564 (Siasconset ) — the breadth of educational profiles across the area.
Within Massachusetts, this is the #14 most populous of 14 counties and ranks #3 for median household income with the #1 fastest decade growth .
On the national stage, Nantucket County is ranks #33 for income , and #31 for decade growth .
Weighted by population, the typical household earns about $140,938 across the county — reflecting what a typical resident sees, not a simple ZIP average.
56.3% of adults age 25+ hold a bachelor's degree or higher (5,930 of 10,529 reporting).
1 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.