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Where 51645 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 51645 into a pocket calculator and turn it upside down: ShgIS — not quite a word, sorry.
- ➕ As a number, 51,645 = 3 × 5 × 11 × 313. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100110111101 - 🏠 Its numerical neighbours: 51640 (Hamburg, IA, 22 mi away) and 51646 (New Market, IA, 30 mi away).
- 🔄 Backwards, 51645 becomes 54615 — and that is a real ZIP code: Black River Falls, WI, 332 miles away.
- 👥 31 other ZIP codes are made of exactly the same digits (14556, 15456, 15465, 15546, 15564, 41655, …). The farthest-flung twin is 14556 in Sonyea, NY, 913 miles away.
- 🧭 Farther north than 66% of all ZIP codes, and farther west than 70%.
- 🎯181 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51645 and you would come out at 40.88°S, 84.58°E — 910 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
- 📏 At 45.1 square miles of land, 51645 is bigger than 57% of ZIP codes — room for about 34 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 419This ZIP419 |
|---|---|
| Households | 125This ZIP125 |
| Housing units | 125This ZIP125 |
| Median age | 49.3This ZIP49.3Iowa38.6US 38.9 |
| Median household income | $217,898This ZIP$217,898Iowa$75,059US $80,734 |
| Bachelor's degree or higher | 51.2%This ZIP51.2% |
| Mean commute | 18.4 minThis ZIP18.4 min |
| Population density | 9.3 / sq miThis ZIP9.3 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 4This ZIP4 |
| Annual payroll | $133,000This ZIP$133,000 |
| Tax returns filed | 100This ZIP100 |
| Total adjusted gross income | $9,037,000This ZIP$9,037,000 |
Land area
| Land area | 45.15 sq miThis ZIP45.15 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 51645 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Fremont County | 57.5% |
| Mills County | 30.1% |
| Montgomery County | 7.0% |
| Page County | 5.5% |
Other place names in 51645
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51645
| ZIP | City | Distance |
|---|---|---|
51649 | Randolph, IA | 5.9 mi |
51603 | Shenandoah, IA | 8.5 mi |
51638 | Essex, IA | 8.7 mi |
51540 | Hastings, IA | 10.6 mi |
51601 | Shenandoah, IA | 10.9 mi |
51533 | Emerson, IA | 11.1 mi |
51551 | Malvern, IA | 11.4 mi |
51639 | Farragut, IA | 11.4 mi |
51652 | Sidney, IA | 12.9 mi |
51653 | Tabor, IA | 13.6 mi |
Find every ZIP code within 10 miles of 51645 →
Questions about this ZIP code
Where is ZIP code 51645?
51645 is in Imogene, Iowa, in Fremont County. Its published point location is 40.8821, -95.4229.
What county is 51645 in?
51645 spans 4 counties: Fremont County, Mills County, Montgomery County and Page County. Most of it falls in Fremont 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 51645?
Imogene uses area code 712, from NANPA's telephone records.
What time zone is 51645 in?
51645 uses America/Chicago.
How many people live in 51645?
About 419 people live in ZIP code 51645, in 125 households, at 9.3 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 51645?
$217,898 a year, against $75,059 across Iowa.
What ZIP codes are near 51645?
The closest are 51649 (5.9 mi), 51603 (8.5 mi), 51638 (8.7 mi), 51540 (10.6 mi) and 51601 (10.9 mi).
Is 51645 a PO Box ZIP code?
51645 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51645 ZIP Code — Imogene, Iowa (Fremont County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51645
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51645.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.