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Where 83605 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 83605 into a pocket calculator and turn it upside down: SOgEB — not quite a word, sorry.
- ➕ As a number, 83,605 = 5 × 23 × 727. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10100011010010101 - 🏠 Its numerical neighbours: 83604 (Bruneau, ID, 80 mi away) and 83606 (Caldwell, ID, 8 mi away).
- 🔄 Backwards, 83605 becomes 50638 — and that is a real ZIP code: Grundy Center, IA, 1,205 miles away.
- 👥 49 other ZIP codes are made of exactly the same digits (03586, 03856, 03865, 05836, 05863, 06385, …). The farthest-flung twin is 03856 in Newfields, NH, 2,266 miles away.
- 🧭 Farther north than 86% of all ZIP codes, and farther west than 89%.
- 🎯966 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 83605 and you would come out at 43.66°S, 63.35°E — 510 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 27m of daylight. Shortest: 8h 55m.
- 📏 At 24.6 square miles of land, 83605 is bigger than 41% of ZIP codes — room for about 19 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 41,325This ZIP41,325 |
|---|---|
| Households | 13,709This ZIP13,709 |
| Housing units | 14,391This ZIP14,391 |
| Median age | 32.4This ZIP32.4Idaho37.3US 38.9 |
| Median household income | $68,427This ZIP$68,427Idaho$77,800US $80,734 |
| Median home value | $346,100This ZIP$346,100Idaho$418,600US $332,700 |
| Median gross rent | $1,124This ZIP$1,124Idaho$1,238US $1,413 |
| Bachelor's degree or higher | 15.1%This ZIP15.1% |
| Mean commute | 23.3 minThis ZIP23.3 min |
| Population density | 1,678.0 / sq miThis ZIP1,678.0 / sq mi |
Business and tax activity
| Business establishments | 1,140This ZIP1,140 |
|---|---|
| Employees | 16,390This ZIP16,390 |
| Annual payroll | $796,445,000This ZIP$796,445,000 |
| Tax returns filed | 17,070This ZIP17,070 |
| Total adjusted gross income | $943,867,000This ZIP$943,867,000 |
Land area
| Land area | 24.63 sq miThis ZIP24.63 sq mi |
|---|---|
| Water area | 0.26 sq miThis ZIP0.26 sq mi |
Other place names in 83605
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 83605
| ZIP | City | Distance |
|---|---|---|
83652 | Nampa, ID | 3.4 mi |
83607 | Caldwell, ID | 5.3 mi |
83651 | Nampa, ID | 5.5 mi |
83644 | Middleton, ID | 6.7 mi |
83687 | Nampa, ID | 7.2 mi |
83653 | Nampa, ID | 7.4 mi |
83630 | Huston, ID | 8.1 mi |
83656 | Notus, ID | 8.3 mi |
83606 | Caldwell, ID | 8.5 mi |
83626 | Greenleaf, ID | 8.7 mi |
Find every ZIP code within 10 miles of 83605 →
Questions about this ZIP code
Where is ZIP code 83605?
83605 is in Caldwell, Idaho, in Canyon County, part of the Boise City, ID metropolitan area. Its published point location is 43.6641, -116.6517.
What county is 83605 in?
83605 lies in Canyon County.
What area code is 83605?
Caldwell uses area codes 208 and 986, from NANPA's telephone records.
What time zone is 83605 in?
83605 uses America/Boise.
How many people live in 83605?
About 41,325 people live in ZIP code 83605, in 13,709 households, at 1,678.0 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 83605?
$68,427 a year, against $77,800 across Idaho.
What ZIP codes are near 83605?
The closest are 83652 (3.4 mi), 83607 (5.3 mi), 83651 (5.5 mi), 83644 (6.7 mi) and 83687 (7.2 mi).
Is 83605 a PO Box ZIP code?
83605 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “83605 ZIP Code — Caldwell, Idaho (Canyon County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83605
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/83605.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.