| ZIP Codes: | 39 ZIP Codes (34 Standard, 4 PO Box, 1 Unique) [See All] |
| Area Code: | 603 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:09 PM |
| Population: | 426,425 [See All] |
| FIPS: | 33011 |
| CBSA: | Manchester-Nashua, NH |
| Land Area: | 892 sq mi |
| Water Area: | 16 sq mi |
| Coordinates: | 42.8929, -71.6369 |
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426,425 residents live across 39 ZIPs covering 892 sq mi, served by 28 distinct USPS-recognized cities.
Population moved from 402,863 to 426,425 from 2014 to 2024 — a +5.8% change. 28 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 03033 (Brookline, $171,046 median) and poorest ZIP 03103 (Manchester, $73,540) are 17.8 miles apart — a 2.3× income gap across local geography.
Median home values vary 2.6× across this county — from $257,300 in 03048 (Greenville) to $675,900 in 03049 (Hollis).
Density varies 100× across the county — from 46 people/sq mi in 03043 (Francestown) to 4,608 in 03060 (Nashua).
Educational attainment ranges from 22.9% bachelor's+ in 03048 (Greenville) to 65.8% in 03031 (Amherst) — the breadth of educational profiles across the area.
Within New Hampshire, this is the #1 most populous of 11 counties and ranks #2 for median household income with the #6 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 03111Shared Firm Zip .
Weighted by population, the typical household earns about $109,155 across the county — reflecting what a typical resident sees, not a simple ZIP average.
41.5% of adults age 25+ hold a bachelor's degree or higher (127,882 of 307,848 reporting).
34 Standard delivery, 4 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 03103 | Manchester | Standard | 37,775 | $73,540 | 10.4 | 1.3% |
| 03104 | Manchester | Standard | 35,237 | $88,897 | 8.5 | 7.8% |
| 03102 | Manchester | Standard | 33,959 | $74,327 | 9.4 | 8.1% |
| 03060 | Nashua | Standard | 31,657 | $79,855 | 6.9 | 7.4% |
| 03062 | Nashua | Standard | 29,441 | $107,540 | 12.2 | 9.0% |
| 03054 | Merrimack | Standard | 28,176 | $127,303 | 33.5 | 10.2% |
| 03051 | Hudson | Standard | 25,557 | $124,213 | 29.2 | 3.7% |
| 03110 | Bedford | Standard | 23,746 | $167,418 | 33.1 | 10.7% |
| 03055 | Milford | Standard | 16,337 | $97,768 | 25.5 | 8.3% |
| 03063 | Nashua | Standard | 15,805 | $107,630 | 8.2 | -1.4% |
| 03076 | Pelham | Standard | 14,449 | $135,956 | 26.9 | 10.9% |
| 03064 | Nashua | Standard | 14,391 | $96,393 | 4.5 | 0.8% |
| 03045 | Goffstown | Standard | 14,080 | $119,205 | 36.5 | 3.7% |
| 03031 | Amherst | Standard | 11,849 | $153,125 | 34.0 | 5.0% |
| 03109 | Manchester | Standard | 9,929 | $108,144 | 8.2 | -1.1% |
| 03281 | Weare | Standard | 9,170 | $118,271 | 60.2 | 3.6% |
| 03049 | Hollis | Standard | 8,603 | $168,883 | 32.3 | 11.4% |
| 03052 | Litchfield | Standard | 8,499 | $162,036 | 15.4 | 2.8% |
| 03244 | Hillsborough | Standard | 8,156 | $86,375 | 83.8 | 1.5% |
| 03458 | Peterborough | Standard | 6,872 | $98,684 | 52.9 | 2.5% |
| 03070 | New Boston | Standard | 6,177 | $154,000 | 43.4 | 16.1% |
| 03033 | Brookline | Standard | 5,736 | $171,046 | 20.2 | 13.6% |
| 03071 | New Ipswich | Standard | 5,310 | $110,507 | 32.7 | 3.0% |
| 03086 | Wilton | Standard | 4,258 | $113,750 | 29.1 | 11.3% |
| 03048 | Greenville | Standard | 3,237 | $90,451 | 27.5 | -8.1% |
| 03101 | Manchester | Standard | 3,201 | $84,434 | 0.9 | 10.3% |
| 03057 | Mont Vernon | Standard | 2,709 | $156,250 | 18.0 | 4.3% |
| 03440 | Antrim | Standard | 2,661 | $88,889 | 32.1 | 0.8% |
| 03449 | Hancock | Standard | 1,838 | $92,708 | 36.4 | 1.8% |
| 03047 | Greenfield | Standard | 1,730 | $103,603 | 26.3 | 17.1% |
| 03442 | Bennington | Standard | 1,588 | $83,875 | 11.7 | 16.2% |
| 03082 | Lyndeborough | Standard | 1,531 | $120,313 | 29.2 | -3.2% |
| 03043 | Francestown | Standard | 1,398 | $104,063 | 30.2 | -11.1% |
| 03084 | Temple | Standard | 1,363 | $94,107 | 22.6 | -14.5% |
| 03468 | West Peterborough | PO Box | — | — | 0.0 | — |
| 03061 | Nashua | PO Box | — | — | 0.0 | — |
| 03105 | Manchester | PO Box | — | — | 0.0 | — |
| 03111 | Manchester | Unique | — | — | 0.0 | — |
| 03108 | Manchester | PO Box | — | — | 0.0 | — |