83421
ZIP 83421 is Chester, Idaho, in Fremont County; area codes 208 and 986; Mountain time.
- Type
- Standard
- Time zone
- America/Boise
- County
- Fremont
- Metro area
- Rexburg, ID
- Population
- 220
- Coordinates
- 44.0019, -111.5473
Weather right now
Asking the National Weather Service…
Where 83421 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 83421 into a pocket calculator and turn it upside down: IZhEB — not quite a word, sorry.
- ➕ As a number, 83,421 = 3 × 3 × 13 × 23 × 31. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10100010111011101 - 🏠 Its numerical neighbours: 83420 (Ashton, ID, 12 mi away) and 83422 (Driggs, ID, 25 mi away).
- 🔄 Backwards, 83421 becomes 12438 — and that is a real ZIP code: Halcottsville, NY, 1,852 miles away.
- 👥 55 other ZIP codes are made of exactly the same digits (12438, 12483, 12834, 12843, 13428, 13482, …). The farthest-flung twin is 34281 in Bradenton, FL, 1,978 miles away.
- 🧭 Farther north than 87% of all ZIP codes, and farther west than 86%.
- 🎯725 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 83421 and you would come out at 44.00°S, 68.45°E — 379 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 29m of daylight. Shortest: 8h 53m.
- 📏 At 11.7 square miles of land, 83421 is bigger than 29% of ZIP codes — room for about 8.9 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 220This ZIP220 |
|---|---|
| Households | 115This ZIP115 |
| Housing units | 148This ZIP148 |
| Median age | 62.4This ZIP62.4Idaho37.3US 38.9 |
| Median home value | $282,400This ZIP$282,400Idaho$418,600US $332,700 |
| Bachelor's degree or higher | 7.6%This ZIP7.6% |
| Population density | 18.8 / sq miThis ZIP18.8 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 19This ZIP19 |
| Annual payroll | $837,000This ZIP$837,000 |
Land area
| Land area | 11.69 sq miThis ZIP11.69 sq mi |
|---|---|
| Water area | 0.15 sq miThis ZIP0.15 sq mi |
ZIP codes near 83421
| ZIP | City | Distance |
|---|---|---|
83445 | Saint Anthony, ID | 10.1 mi |
83451 | Teton, ID | 10.3 mi |
83436 | Newdale, ID | 10.4 mi |
83438 | Parker, ID | 10.9 mi |
83420 | Ashton, ID | 11.7 mi |
83448 | Sugar City, ID | 13.3 mi |
83441 | Rexburg, ID | 17.2 mi |
83460 | Rexburg, ID | 17.4 mi |
83440 | Rexburg, ID | 18.6 mi |
83424 | Felt, ID | 18.7 mi |
Find every ZIP code within 10 miles of 83421 →
Questions about this ZIP code
Where is ZIP code 83421?
83421 is in Chester, Idaho, in Fremont County, part of the Rexburg, ID micropolitan area. Its published point location is 44.0019, -111.5473.
What county is 83421 in?
83421 lies in Fremont County.
What area code is 83421?
Chester uses area codes 208 and 986, from NANPA's telephone records.
What time zone is 83421 in?
83421 uses America/Boise.
How many people live in 83421?
About 220 people live in ZIP code 83421, in 115 households, at 18.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 83421?
The closest are 83445 (10.1 mi), 83451 (10.3 mi), 83436 (10.4 mi), 83438 (10.9 mi) and 83420 (11.7 mi).
Is 83421 a PO Box ZIP code?
83421 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “83421 ZIP Code — Chester, Idaho (Fremont County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83421
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/83421.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.