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Where 51647 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 51647 into a pocket calculator and turn it upside down: LhgIS — not quite a word, sorry.
- ➕ 51647 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 23, a total 2,533 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100110111111 - 🏠 Its numerical neighbours: 51646 (New Market, IA, 27 mi away) and 51648 (Percival, IA, 26 mi away).
- 🔄 Backwards, 51647 becomes 74615, which is not a ZIP code at all.
- 👥 55 other ZIP codes are made of exactly the same digits (14756, 15467, 15476, 15647, 15674, 15746, …). The farthest-flung twin is 17564 in Penryn, PA, 1,002 miles away.
- 🧭 Farther north than 62% of all ZIP codes, and farther west than 69%.
- 🎯179 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51647 and you would come out at 40.61°S, 84.65°E — 926 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 16m.
- 📏 At 25.0 square miles of land, 51647 is bigger than 42% of ZIP codes — room for about 19 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 172This ZIP172 |
|---|---|
| Households | 101This ZIP101 |
| Housing units | 104This ZIP104 |
| Median age | 70.5This ZIP70.5Iowa38.6US 38.9 |
| Median household income | $23,633This ZIP$23,633Iowa$75,059US $80,734 |
| Bachelor's degree or higher | 28.0%This ZIP28.0% |
| Mean commute | 19.6 minThis ZIP19.6 min |
| Population density | 6.9 / sq miThis ZIP6.9 / sq mi |
Business and tax activity
| Business establishments | 3This ZIP3 |
|---|---|
| Employees | 9This ZIP9 |
| Annual payroll | $289,000This ZIP$289,000 |
Land area
| Land area | 24.96 sq miThis ZIP24.96 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 51647 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Page County | 75.2% |
| Fremont County | 24.8% |
Other place names in 51647
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51647
| ZIP | City | Distance |
|---|---|---|
64498 | Westboro, MO | 4.8 mi |
51636 | Coin, IA | 7.2 mi |
51630 | Blanchard, IA | 7.9 mi |
51601 | Shenandoah, IA | 9.0 mi |
51639 | Farragut, IA | 10.2 mi |
64491 | Tarkio, MO | 11.0 mi |
51603 | Shenandoah, IA | 11.2 mi |
64445 | Elmo, MO | 11.2 mi |
51650 | Riverton, IA | 11.9 mi |
51637 | College Springs, IA | 11.9 mi |
Find every ZIP code within 10 miles of 51647 →
Questions about this ZIP code
Where is ZIP code 51647?
51647 is in Northboro, Iowa, in Page County. Its published point location is 40.6054, -95.3451.
What county is 51647 in?
51647 spans 2 counties: Page County and Fremont County. Most of it falls in Page 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 51647?
Northboro uses area code 712, from NANPA's telephone records.
What time zone is 51647 in?
51647 uses America/Chicago.
How many people live in 51647?
About 172 people live in ZIP code 51647, in 101 households, at 6.9 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 51647?
$23,633 a year, against $75,059 across Iowa.
What ZIP codes are near 51647?
The closest are 64498 (4.8 mi), 51636 (7.2 mi), 51630 (7.9 mi), 51601 (9 mi) and 51639 (10.2 mi).
Is 51647 a PO Box ZIP code?
51647 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51647 ZIP Code — Northboro, Iowa (Page County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51647
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51647.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.