Weather right now
Asking the National Weather Service…
Where 03431 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 03431 into a pocket calculator and turn it upside down: IEhEO — not quite a word, sorry.
- ➕ As a number, 3,431 = 47 × 73. Its digits add up to 11, a total 714 other ZIP codes share.
- 💾In binary, the way a computer stores it:
110101100111 - 🏠 Its numerical neighbours: 03307 (Loudon, NH, 50 mi away) and 03435 (Keene, NH, 3 mi away).
- 🔄 Backwards, 03431 becomes 13430, which is not a ZIP code at all.
- 👥 31 other ZIP codes are made of exactly the same digits (01343, 13034, 13043, 13304, 13340, 13403, …). The farthest-flung twin is 34031 in APO AA, a military post office, 3,813 miles away.
- 🧭 Farther north than 82% of all ZIP codes, and farther east than 94%.
- 🎯1,373 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 03431 and you would come out at 42.97°S, 107.70°E — 882 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 21m of daylight. Shortest: 9h 00m.
- 📏 At 60.0 square miles of land, 03431 is bigger than 64% of ZIP codes — room for about 46 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 25,065This ZIP25,065 |
|---|---|
| Households | 10,228This ZIP10,228 |
| Housing units | 11,503This ZIP11,503 |
| Median age | 38.4This ZIP38.4New Hampshire43.3US 38.9 |
| Median household income | $79,541This ZIP$79,541New Hampshire$99,031US $80,734 |
| Median home value | $255,500This ZIP$255,500New Hampshire$402,500US $332,700 |
| Median gross rent | $1,343This ZIP$1,343New Hampshire$1,491US $1,413 |
| Bachelor's degree or higher | 41.9%This ZIP41.9% |
| Mean commute | 17.7 minThis ZIP17.7 min |
| Population density | 418.1 / sq miThis ZIP418.1 / sq mi |
Business and tax activity
| Business establishments | 841This ZIP841 |
|---|---|
| Employees | 16,004This ZIP16,004 |
| Annual payroll | $908,903,000This ZIP$908,903,000 |
| Tax returns filed | 12,010This ZIP12,010 |
| Total adjusted gross income | $979,736,000This ZIP$979,736,000 |
Land area
| Land area | 59.96 sq miThis ZIP59.96 sq mi |
|---|---|
| Water area | 0.77 sq miThis ZIP0.77 sq mi |
Other place names in 03431
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 03431
| ZIP | City | Distance |
|---|---|---|
03435 | Keene, NH | 2.7 mi |
03448 | Gilsum, NH | 5.4 mi |
03445 | Sullivan, NH | 5.7 mi |
03467 | Westmoreland, NH | 6.5 mi |
03469 | West Swanzey, NH | 6.6 mi |
03462 | Spofford, NH | 6.9 mi |
03446 | Swanzey, NH | 7.7 mi |
03455 | Marlborough, NH | 8.0 mi |
03608 | Walpole, NH | 8.8 mi |
03457 | Nelson, NH | 9.4 mi |
Find every ZIP code within 10 miles of 03431 →
Questions about this ZIP code
Where is ZIP code 03431?
03431 is in Keene, New Hampshire, in Cheshire County, part of the Keene, NH micropolitan area. Its published point location is 42.9691, -72.3020.
What county is 03431 in?
03431 lies in Cheshire County.
What area code is 03431?
Keene uses area code 603, from NANPA's telephone records.
What time zone is 03431 in?
03431 uses America/New_York.
How many people live in 03431?
About 25,065 people live in ZIP code 03431, in 10,228 households, at 418.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 03431?
$79,541 a year, against $99,031 across New Hampshire.
What ZIP codes are near 03431?
The closest are 03435 (2.7 mi), 03448 (5.4 mi), 03445 (5.7 mi), 03467 (6.5 mi) and 03469 (6.6 mi).
Is 03431 a PO Box ZIP code?
03431 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “03431 ZIP Code — Keene, New Hampshire (Cheshire County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/03431
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/03431.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.