| ZIP Codes: | 29 ZIP Codes (23 Standard, 5 PO Box, 1 Unique) [See All] |
| Area Code: | 413 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:27 PM |
| Population: | 163,328 [See All] |
| FIPS: | 25015 |
| CBSA: | Amherst Town-Northampton, MA |
| Land Area: | 586 sq mi |
| Water Area: | 21 sq mi |
| Coordinates: | 42.3616, -72.6830 |
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163,328 residents live across 29 ZIPs covering 586 sq mi, served by 25 distinct USPS-recognized cities.
Population moved from 161,695 to 163,328 from 2014 to 2024 — a +1.0% change. 14 ZIPs gained residents, 12 lost.
The county's wealthiest ZIP 01073 (Southampton, $123,125 median) and poorest ZIP 01082 (Ware, $69,018) are 25.4 miles apart — a 1.8× income gap across local geography.
Median home values vary 1.8× across this county — from $289,500 in 01050 (Huntington) to $511,000 in 01035 (Hadley).
Density varies 764× across the county — from 30 people/sq mi in 01098 (Worthington) to 22,996 in 01063 (Northampton).
Educational attainment ranges from 24.4% bachelor's+ in 01082 (Ware) to 75.4% in 01002 (Amherst) — the breadth of educational profiles across the area.
Within Massachusetts, this is the #10 most populous of 14 counties and ranks #12 for median household income .
Hosts 1 single-entity Unique ZIP: 01063Smith College .
Weighted by population, the typical household earns about $88,500 across the county — reflecting what a typical resident sees, not a simple ZIP average.
51.7% of adults age 25+ hold a bachelor's degree or higher (52,730 of 101,906 reporting). The most-educated ZIPs cluster around Northampton.
23 Standard delivery, 5 PO Box only, 1 single-entity Unique ZIPs serve this county.
5 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 01002 | Amherst | Standard | 26,370 | $70,818 | 52.3 | -11.6% |
| 01075 | South Hadley | Standard | 17,754 | $93,910 | 18.9 | -0.4% |
| 01027 | Easthampton | Standard | 17,716 | $74,146 | 40.8 | 0.4% |
| 01060 | Northampton | Standard | 16,492 | $76,848 | 12.1 | 7.5% |
| 01007 | Belchertown | Standard | 15,419 | $108,125 | 58.6 | 4.4% |
| 01003 | Amherst | Standard | 13,510 | — | 1.7 | 22.1% |
| 01082 | Ware | Standard | 10,392 | $69,018 | 71.1 | 0.0% |
| 01062 | Florence | Standard | 9,816 | $87,588 | 17.6 | -9.4% |
| 01073 | Southampton | Standard | 6,230 | $123,125 | 29.0 | 4.6% |
| 01033 | Granby | Standard | 6,080 | $119,297 | 27.8 | -2.2% |
| 01035 | Hadley | Standard | 5,306 | $119,259 | 23.7 | 0.4% |
| 01096 | Williamsburg | Standard | 2,580 | $104,375 | 38.7 | 2.3% |
| 01050 | Huntington | Standard | 2,529 | $95,882 | 45.1 | 0.7% |
| 01038 | Hatfield | Standard | 2,491 | $106,635 | 10.5 | -12.2% |
| 01053 | Leeds | Standard | 2,304 | $92,582 | 5.8 | 24.7% |
| 01063 | Northampton | Unique | 2,272 | $91,344 | 0.1 | 271.2% |
| 01039 | Haydenville | Standard | 1,506 | $116,429 | 16.8 | 11.2% |
| 01026 | Cummington | Standard | 1,014 | $92,250 | 28.8 | 0.5% |
| 01098 | Worthington | Standard | 979 | $96,250 | 32.5 | -10.6% |
| 01088 | West Hatfield | Standard | 702 | $85,368 | 5.4 | 57.4% |
| 01070 | Plainfield | Standard | 575 | $60,536 | 20.8 | -0.9% |
| 01032 | Goshen | Standard | 509 | $97,500 | 6.2 | -13.0% |
| 01012 | Chesterfield | Standard | 397 | $83,333 | 12.6 | -20.4% |
| 01243 | Middlefield | PO Box | 173 | $91,250 | 0.4 | -54.8% |
| 01066 | North Hatfield | PO Box | 115 | — | 1.0 | 1050.0% |
| 01084 | West Chesterfield | Standard | 97 | $93,125 | 7.3 | -54.0% |
| 01004 | Amherst | PO Box | — | — | 0.0 | — |
| 01061 | Northampton | PO Box | — | — | 0.0 | — |
| 01059 | North Amherst | PO Box | — | — | 0.0 | — |