Weather right now
Asking the National Weather Service…
Where 51433 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 51433 into a pocket calculator and turn it upside down: EEhIS — not quite a word, sorry.
- ➕ As a number, 51,433 = 19 × 2707. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100011101001 - 🏠 Its numerical neighbours: 51432 (Aspinwall, IA, 28 mi away) and 51436 (Breda, IA, 9 mi away).
- 🔄 Backwards, 51433 becomes 33415 — and that is a real ZIP code: West Palm Beach, FL, 1,363 miles away.
- 👥 26 other ZIP codes are made of exactly the same digits (13345, 13354, 13435, 14533, 15334, 15433, …). The farthest-flung twin is 33145 in Miami, FL, 1,411 miles away.
- 🧭 Farther north than 77% of all ZIP codes, and farther west than 68%.
- 🎯256 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51433 and you would come out at 42.27°S, 85.12°E — 866 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
- 📏 At 56.8 square miles of land, 51433 is bigger than 63% of ZIP codes — room for about 43 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 567This ZIP567 |
|---|---|
| Households | 227This ZIP227 |
| Housing units | 244This ZIP244 |
| Median age | 38.2This ZIP38.2Iowa38.6US 38.9 |
| Median household income | $68,125This ZIP$68,125Iowa$75,059US $80,734 |
| Median home value | $153,200This ZIP$153,200Iowa$208,000US $332,700 |
| Median gross rent | $774This ZIP$774Iowa$972US $1,413 |
| Bachelor's degree or higher | 11.8%This ZIP11.8% |
| Mean commute | 35.3 minThis ZIP35.3 min |
| Population density | 10.0 / sq miThis ZIP10.0 / sq mi |
Business and tax activity
| Business establishments | 14This ZIP14 |
|---|---|
| Employees | 63This ZIP63 |
| Annual payroll | $2,808,000This ZIP$2,808,000 |
| Tax returns filed | 290This ZIP290 |
| Total adjusted gross income | $21,869,000This ZIP$21,869,000 |
Land area
| Land area | 56.80 sq miThis ZIP56.80 sq mi |
|---|---|
| Water area | 0.40 sq miThis ZIP0.40 sq mi |
Counties 51433 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Sac County | 58.3% |
| Calhoun County | 41.8% |
Other place names in 51433
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51433
| ZIP | City | Distance |
|---|---|---|
51449 | Lake City, IA | 7.2 mi |
51450 | Lake View, IA | 8.2 mi |
51436 | Breda, IA | 8.5 mi |
50561 | Lytton, IA | 10.5 mi |
51451 | Lanesboro, IA | 10.8 mi |
51452 | Lidderdale, IA | 11.0 mi |
51466 | Wall Lake, IA | 11.5 mi |
50583 | Sac City, IA | 12.8 mi |
51401 | Carroll, IA | 13.9 mi |
51430 | Arcadia, IA | 14.5 mi |
Find every ZIP code within 10 miles of 51433 →
Questions about this ZIP code
Where is ZIP code 51433?
51433 is in Auburn, Iowa, in Sac County. Its published point location is 42.2666, -94.8753.
What county is 51433 in?
51433 spans 2 counties: Sac County and Calhoun County. Most of it falls in Sac 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 51433?
Auburn uses area code 712, from NANPA's telephone records.
What time zone is 51433 in?
51433 uses America/Chicago.
How many people live in 51433?
About 567 people live in ZIP code 51433, in 227 households, at 10.0 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 51433?
$68,125 a year, against $75,059 across Iowa.
What ZIP codes are near 51433?
The closest are 51449 (7.2 mi), 51450 (8.2 mi), 51436 (8.5 mi), 50561 (10.5 mi) and 51451 (10.8 mi).
Is 51433 a PO Box ZIP code?
51433 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51433 ZIP Code — Auburn, Iowa (Sac County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51433
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51433.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.