Residential delivery area · New Hampshire
ZIP Code 03431: Keene, NH
ZIP code 03431 is in Keene, New Hampshire, entirely in Cheshire County (Census 2020 ZIP-county file). About 25,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $79,541 (Census Bureau, ACS 2020-2024). By Census place, 62% of its land lies in Keene; 38% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Keene · its only residential ZIP
- County
- Cheshire County
- Census places
- Keene
- Neighborhoods
- Harper Acres, Longmeadow Subdivision, Maple Acres, Tanglewood Estates GeoNames
- Micro area
- Keene, NH
- House district
- NH-2 119th Congress
- State
- New Hampshire
- Time zone
- Eastern
- Land area
- 60.0 sq mi · 418 people per sq mi
- PO Box ZIPs
- 03435 also use the name Keene
Where is ZIP code 03431?
03431 centers on 42.969°, -72.302° and covers 60.0 square miles of land plus 0.8 of water. It borders 9 ZIP codes: 03448, 03445, 03467, 03462, 03446, 03455, 03608, 03457, 03602.
The map draws ZIP code areas only. For the streets inside 03431, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 03431 compare with the rest of Cheshire County?
| Measure | 03431 | In Cheshire County | In NH |
|---|---|---|---|
| People (ACS 2020-2024) | 25,065 | 1st of 25 | 13th of 247 |
| Median household income | $80k | 7th of 11 | 124th of 158 |
| Median home value | $256k | 12th of 15 | 173rd of 191 |
Its median household income is higher than in 61% of U.S. residential ZIP codes, and it is denser than 70% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 03431?
The 2020 Census counted 24,978 people in 03431; the ACS, which samples households over 2020-2024, estimates 25,065. Between the 2010 and 2020 censuses its population fell 1.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 25,065
- 2020 Census count
- 24,978−1.2% since 2010 (25,280)
- Households
- 10,228
- Median age
- 38.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 03431?
Of the 25,065 people the ACS estimates in 03431, 14.2% are under 18 and 19.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.5%).
- Under 1814.2%
- 18 to 6466.3%
- 65 and older19.5%
- White, not Hispanic91.5%
- Other or two or more4.6%
- Hispanic or Latino1.7%
- Black, not Hispanic1.5%
- Asian, not Hispanic0.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 03431 earn?
Median household income is $79,541 (ACS 2020-2024), the 7th highest of the 11 ranked ZIP codes in Cheshire County. It rose from $69,781 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $79,541
- Income per person
- $41,070
- Below the poverty line
- 9.8%
- Unemployed (of the labor force)
- 2.0%
- Adults 25+ with a bachelor's degree
- 41.9%
- Adjusted gross income per tax return, 2022
- $81,57712,010 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 03431?
FHFA's house price index for 03431, built from repeat sales and appraisals of the same homes, rose 104% from 2015 to 2025 and rose 68% from 2020 to 2025, and moved +5.1% in 2025.
- Median home value (owners' estimate)
- $255,500
- Median gross rent
- $1,343
- Homes owned by their occupants
- 56.2%
- Housing units
- 11,503
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 03431?
841 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade148
- Health care and social assistance115
- Accommodation and food services92
- Other services (except public administration)92
- Professional, scientific, and technical services68
- Construction56
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 03431?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 03448 | Gilsum | 716 | $80k | 5.4 mi |
| 03445 | Sullivan | 687 | $107k | 5.7 mi |
| 03467 | Westmoreland | 2,237 | $104k | 6.5 mi |
| 03462 | Spofford | 1,726 | $115k | 6.9 mi |
| 03446 | Swanzey | 6,588 | $86k | 7.7 mi |
| 03455 | Marlborough | 2,242 | $69k | 8.0 mi |
| 03608 | Walpole | 3,167 | $88k | 8.8 mi |
| 03457 | Nelson | 802 | $101k | 9.4 mi |
| 03602 | Alstead | 2,381 | $71k | 12.1 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Keene?
1 more ZIP code carries the postal name Keene, NH without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 03435 | Cheshire County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.