83440
ZIP 83440 is in Rexburg, Idaho, mostly in Madison County; area codes 208 and 986; Mountain time. Rexburg has 3 ZIP codes; the others are 83441 and 83460.
- Type
- Standard
- Time zone
- America/Boise
- County
- Madison +1 more
- Metro area
- Rexburg, ID
- Population
- 51,421
- Coordinates
- 43.8086, -111.8086
Weather right now
Asking the National Weather Service…
Where 83440 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 83440 into a pocket calculator and turn it upside down: OhhEB — not quite a word, sorry.
- ➕ As a number, 83,440 = 2 × 2 × 2 × 2 × 5 × 7 × 149. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10100010111110000 - 🏠 Its numerical neighbours: 83438 (Parker, ID, 11 mi away) and 83441 (Rexburg, ID, 6 mi away).
- 🔄 Backwards, 83440 becomes 04438 — and that is a real ZIP code: Frankfort, ME, 2,100 miles away.
- 👥 32 other ZIP codes are made of exactly the same digits (03448, 03844, 04348, 04438, 04843, 08344, …). The farthest-flung twin is 04438 in Frankfort, ME, 2,100 miles away.
- 🧭 Farther north than 87% of all ZIP codes, and farther west than 87%.
- 🎯734 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 83440 and you would come out at 43.81°S, 68.19°E — 395 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 28m of daylight. Shortest: 8h 54m.
- 📏 At 181.7 square miles of land, 83440 is bigger than 89% of ZIP codes — room for about 138 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 51,421This ZIP51,421 |
|---|---|
| Households | 12,426This ZIP12,426 |
| Housing units | 14,120This ZIP14,120 |
| Median age | 21.3This ZIP21.3Idaho37.3US 38.9 |
| Median household income | $58,159This ZIP$58,159Idaho$77,800US $80,734 |
| Median home value | $419,300This ZIP$419,300Idaho$418,600US $332,700 |
| Median gross rent | $1,000This ZIP$1,000Idaho$1,238US $1,413 |
| Bachelor's degree or higher | 40.9%This ZIP40.9% |
| Mean commute | 16.2 minThis ZIP16.2 min |
| Population density | 283.1 / sq miThis ZIP283.1 / sq mi |
Business and tax activity
| Business establishments | 1,046This ZIP1,046 |
|---|---|
| Employees | 11,558This ZIP11,558 |
| Annual payroll | $437,674,000This ZIP$437,674,000 |
| Tax returns filed | 14,760This ZIP14,760 |
| Total adjusted gross income | $869,184,000This ZIP$869,184,000 |
Land area
| Land area | 181.67 sq miThis ZIP181.67 sq mi |
|---|---|
| Water area | 3.13 sq miThis ZIP3.13 sq mi |
Counties 83440 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Madison County | 96.1% |
| Fremont County | 3.9% |
Other place names in 83440
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 83440
| ZIP | City | Distance |
|---|---|---|
83460 | Rexburg, ID | 1.4 mi |
83448 | Sugar City, ID | 5.6 mi |
83441 | Rexburg, ID | 6.3 mi |
83451 | Teton, ID | 9.6 mi |
83434 | Menan, ID | 10.5 mi |
83438 | Parker, ID | 10.7 mi |
83442 | Rigby, ID | 12.5 mi |
83431 | Lewisville, ID | 13.9 mi |
83445 | Saint Anthony, ID | 16.1 mi |
83454 | Ucon, ID | 16.5 mi |
Find every ZIP code within 10 miles of 83440 →
Questions about this ZIP code
Where is ZIP code 83440?
83440 is in Rexburg, Idaho, in Madison County, part of the Rexburg, ID micropolitan area. Its published point location is 43.8086, -111.8086.
What county is 83440 in?
83440 spans 2 counties: Madison County and Fremont County. Most of it falls in Madison County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 83440?
Rexburg uses area codes 208 and 986, from NANPA's telephone records.
What time zone is 83440 in?
83440 uses America/Boise.
How many people live in 83440?
About 51,421 people live in ZIP code 83440, in 12,426 households, at 283.1 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 83440?
$58,159 a year, against $77,800 across Idaho.
What ZIP codes are near 83440?
The closest are 83460 (1.4 mi), 83448 (5.6 mi), 83441 (6.3 mi), 83451 (9.6 mi) and 83434 (10.5 mi).
Is 83440 a PO Box ZIP code?
83440 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “83440 ZIP Code — Rexburg, Idaho (Madison County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83440
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/83440.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.