Zip Code 03431
Keene, New Hampshire — Cheshire County
📍 ZIP code 03431 is in Keene, Cheshire County, New Hampshire.
ZIP code 03431 is located in Keene, Cheshire County, New Hampshire. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 25,035. The area code for ZIP code 03431 is 603.
Quick Answer
Zip code 03431 is in Keene, New Hampshire (Cheshire County). It has a population of 25,035, median household income of $78,196, and median home value of $233,900.
Population
25,035
Income
$78,196
Home Value
$233,900
Climate
82°F / 10°F
About Zip Code 03431
Zip code 03431 is located in Keene, New Hampshire, within Cheshire County. Home to approximately 25,035 residents, this area sits at an elevation of 682 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 603.
The median household income is $78,196 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $233,900, and the cost of living index is 85 (15% below the national average of 100).
Summers average a high of 82°F while winters drop to 10°F. The area receives about 46 in of rain and 60 in of snow annually. The zip code covers 59.4 square miles of land area and 0.8 square miles of water.
Key Statistics
25,035
$78,196
$233,900
Eastern (EST/EDT)
603
682 ft
59.4 sq mi
36.8
11,168
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Compare With Nearby Zip Codes
| Metric | 03431 | 03445 | 03448 | 03467 | 03462 | 03446 |
|---|---|---|---|---|---|---|
| City | Keene, NH | Sullivan, NH | Gilsum, NH | Westmoreland, NH | Spofford, NH | Keene, NH |
| Population | 25,035 | 699 | 719 | 2,146 | 1,760 | 6,486 |
| Median Income | $78,196 | $95,625 | $70,833 | $98,684 | $106,417 | $82,326 |
| Home Value | $233,900 | $210,600 | $216,800 | $322,700 | $313,700 | $251,200 |
| Cost of Living | 85 | 99 | 84 | 116 | 119 | 93 |
| Median Age | 36.8 | 46.8 | 44.1 | 55.4 | 45.2 | 51.2 |
Cost of Living
100 = National Average. Keene's cost of living is 15% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.0x
Demographics
Zip code 03431 has a population of 25,035 people with a median age of 36.8. There are 11,168 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Keene (03431) population trend from 2010 to 2024
↓ -38.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
82°F
10°F
46 in
60 in
Keene experiences warm summers with average highs around 82°F. Winters are cold with lows averaging 10°F. With 60 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$233,900
Median Household Income
$78,196
With 11,168 housing units across 59.4 square miles, 03431 has a housing density of 188 units per square mile. The home price-to-income ratio is 3.0x.
Location & Geography
Latitude
42.9650°
Longitude
-72.2948°
Land Area
59.4 sq mi
Water Area
0.8 sq mi
Nearby Zip Codes
Zip codes closest to 03431 (Keene, NH) with distances:
All Zip Codes in Keene, NH
Other zip codes serving Keene:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 03431's $78,196. A way to compare Keene to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 03431 (Keene, NH). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Keene, New Hampshire?
Keene, New Hampshire uses zip code 03431 along with 3 other zip codes.
What county is zip code 03431 in?
Zip code 03431 is located in Cheshire County, New Hampshire.
What is the population of zip code 03431?
The population of zip code 03431 is 25,035 with a median age of 36.8.
Is 03431 in Keene, New Hampshire?
Yes, zip code 03431 is in Keene, Cheshire County, New Hampshire. The area code is 603.
Frequently Asked Questions
What city is zip code 03431 in?
Zip code 03431 is in Keene, New Hampshire. It is part of Cheshire County and uses the Eastern (EST/EDT) timezone.
What is zip code 03431?
Zip code 03431 is a U.S. postal code in Keene, New Hampshire (Cheshire County). It has a population of 25,035 and covers 59.4 square miles.
What is the population of zip code 03431?
The population of zip code 03431 (Keene, NH) is 25,035 with a median age of 36.8. There are approximately 11,168 housing units in this area.
What is the median income in zip code 03431?
The median household income in zip code 03431 (Keene, NH) is $78,196 per year. The cost of living index is 85 (100 = national average).
What is the average home price in zip code 03431?
The median home value in zip code 03431 (Keene, NH) is $233,900. The cost of living index is 85 compared to the national average of 100.
What county is zip code 03431 in?
Zip code 03431 is located in Cheshire County, New Hampshire. The primary city is Keene.
What is the area code for zip code 03431?
Zip code 03431 in Keene, NH uses area code 603. It is located in the Eastern (EST/EDT) timezone.
Is zip code 03431 a good place to live?
Zip code 03431 (Keene, NH) has a cost of living index of 85 (100 = national average), a median household income of $78,196, and median home values of $233,900. The median age is 36.8. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 03431?
The cost of living index for zip code 03431 (Keene, NH) is 85, where 100 represents the national average. This area is below the national average. Median home value: $233,900.
What schools serve zip code 03431?
Zip code 03431 in Keene, New Hampshire is served by the local school district of Cheshire County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.