| ZIP Codes: | 44 ZIP Codes (34 Standard, 9 PO Box, 1 Unique) [See All] |
| Area Code: | 603 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:09 PM |
| Population: | 319,082 [See All] |
| FIPS: | 33015 |
| CBSA: | Boston-Cambridge-Newton, MA-NH |
| Land Area: | 723 sq mi |
| Water Area: | 32 sq mi |
| Coordinates: | 42.9763, -71.0528 |
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319,082 residents live across 44 ZIPs covering 723 sq mi, served by 40 distinct USPS-recognized cities.
Population moved from 297,702 to 319,082 from 2014 to 2024 — a +7.2% change. 32 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 03856 (Newfields, $197,885 median) and poorest ZIP 03874 (Seabrook, $82,995) are 12.2 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.7× across this county — from $363,000 in 03261 (Northwood) to $990,700 in 03870 (Rye).
Density varies 13× across the county — from 96 people/sq mi in 03037 (Deerfield) to 1,227 in 03842 (Hampton).
Educational attainment ranges from 26.4% bachelor's+ in 03077 (Raymond) to 69.9% in 03885 (Stratham) — the breadth of educational profiles across the area.
Within New Hampshire, this is the #2 most populous of 11 counties and ranks #1 for median household income with the #2 fastest decade growth .
On the national stage, Rockingham County is ranks #49 for income .
Hosts 1 single-entity Unique ZIP: 03803Air National Guard .
Weighted by population, the typical household earns about $122,708 across the county — reflecting what a typical resident sees, not a simple ZIP average.
45.7% of adults age 25+ hold a bachelor's degree or higher (108,707 of 237,837 reporting).
34 Standard delivery, 9 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 |
|---|---|---|---|---|---|---|
| 03038 | Derry | Standard | 34,474 | $108,322 | 37.0 | 2.6% |
| 03079 | Salem | Standard | 30,964 | $110,490 | 25.9 | 7.4% |
| 03053 | Londonderry | Standard | 26,327 | $134,038 | 40.4 | 10.2% |
| 03801 | Portsmouth | Standard | 23,484 | $106,756 | 28.5 | 5.9% |
| 03833 | Exeter | Standard | 22,817 | $119,393 | 49.2 | 7.9% |
| 03842 | Hampton | Standard | 16,324 | $95,422 | 13.3 | 8.8% |
| 03087 | Windham | Standard | 16,038 | $189,583 | 27.8 | 15.0% |
| 03077 | Raymond | Standard | 10,900 | $104,597 | 29.3 | 5.4% |
| 03857 | Newmarket | Standard | 9,463 | $100,845 | 13.9 | 5.3% |
| 03874 | Seabrook | Standard | 8,487 | $82,995 | 9.6 | -3.7% |
| 03865 | Plaistow | Standard | 7,861 | $108,317 | 10.6 | 3.2% |
| 03885 | Stratham | Standard | 7,754 | $151,998 | 15.8 | 8.1% |
| 03042 | Epping | Standard | 7,430 | $104,220 | 26.1 | 13.9% |
| 03811 | Atkinson | Standard | 7,267 | $146,380 | 11.3 | 7.1% |
| 03873 | Sandown | Standard | 6,628 | $135,040 | 14.5 | 11.8% |
| 03841 | Hampstead | Standard | 6,508 | $104,044 | 11.3 | 6.2% |
| 03848 | Kingston | Standard | 6,275 | $105,330 | 21.1 | 3.5% |
| 03032 | Auburn | Standard | 6,119 | $153,253 | 28.9 | 20.5% |
| 03290 | Nottingham | Standard | 5,357 | $122,201 | 48.6 | 12.1% |
| 03036 | Chester | Standard | 5,300 | $142,212 | 26.2 | 10.4% |
| 03870 | Rye | Standard | 5,188 | $140,938 | 11.9 | -2.0% |
| 03858 | Newton | Standard | 4,836 | $138,487 | 10.0 | 2.5% |
| 03044 | Fremont | Standard | 4,831 | $120,781 | 17.4 | 13.6% |
| 03037 | Deerfield | Standard | 4,714 | $130,371 | 49.2 | 10.1% |
| 03261 | Northwood | Standard | 4,688 | $129,375 | 30.9 | 9.8% |
| 03862 | North Hampton | Standard | 4,610 | $144,583 | 14.1 | 6.1% |
| 03819 | Danville | Standard | 4,471 | $112,335 | 11.1 | 1.1% |
| 03034 | Candia | Standard | 4,352 | $131,350 | 32.4 | 9.6% |
| 03840 | Greenland | Standard | 4,106 | $162,837 | 13.6 | 8.1% |
| 03827 | East Kingston | Standard | 3,279 | $142,794 | 17.7 | 1.5% |
| 03826 | East Hampstead | Standard | 2,654 | $121,184 | 3.4 | 2.8% |
| 03844 | Hampton Falls | Standard | 2,370 | $165,509 | 12.9 | 2.5% |
| 03856 | Newfields | Standard | 2,023 | $197,885 | 7.2 | 24.5% |
| 03854 | New Castle | PO Box | 827 | $176,953 | 1.1 | -15.6% |
| 03871 | Rye Beach | PO Box | 356 | $142,115 | 0.8 | 1447.8% |
| 03291 | West Nottingham | Standard | 0 | — | 0.1 | -100.0% |
| 03040 | East Candia | PO Box | — | — | 0.0 | — |
| 03804 | Portsmouth | PO Box | — | — | 0.0 | — |
| 03802 | Portsmouth | PO Box | — | — | 0.0 | — |
| 03803 | Portsmouth | Unique | — | — | 0.0 | — |
| 03041 | East Derry | PO Box | — | — | 0.0 | — |
| 03843 | Hampton | PO Box | — | — | 0.0 | — |
| 03859 | Newton Junction | PO Box | — | — | 0.0 | — |
| 03073 | North Salem | PO Box | — | — | 0.0 | — |