51247
ZIP 51247 is Rock Valley, Iowa, mostly in Sioux County; area code 712; Central time.
- Type
- Standard
- Time zone
- America/Chicago
- County
- Sioux +1 more
- Metro area
- none
- Population
- 5,094
- Coordinates
- 43.1938, -96.3381
Weather right now
Asking the National Weather Service…
Where 51247 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 51247 into a pocket calculator and turn it upside down: LhZIS — not quite a word, sorry.
- ➕ As a number, 51,247 = 7 × 7321. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100000101111 - 🏠 Its numerical neighbours: 51246 (Rock Rapids, IA, 18 mi away) and 51248 (Sanborn, IA, 34 mi away).
- 🔄 Backwards, 51247 becomes 74215, which is not a ZIP code at all.
- 👥 63 other ZIP codes are made of exactly the same digits (12457, 12475, 12547, 12574, 12745, 12754, …). The farthest-flung twin is 12547 in Milton, NY, 1,141 miles away.
- 🧭 Farther north than 84% of all ZIP codes, and farther west than 72%.
- 🎯260 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 51247 and you would come out at 43.19°S, 83.66°E — 768 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 23m of daylight. Shortest: 8h 59m.
- 📏 At 112.6 square miles of land, 51247 is bigger than 81% of ZIP codes — room for about 85 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 5,094This ZIP5,094 |
|---|---|
| Households | 1,825This ZIP1,825 |
| Housing units | 1,839This ZIP1,839 |
| Median age | 37.7This ZIP37.7Iowa38.6US 38.9 |
| Median household income | $78,358This ZIP$78,358Iowa$75,059US $80,734 |
| Median home value | $262,900This ZIP$262,900Iowa$208,000US $332,700 |
| Median gross rent | $1,142This ZIP$1,142Iowa$972US $1,413 |
| Bachelor's degree or higher | 15.1%This ZIP15.1% |
| Mean commute | 13.6 minThis ZIP13.6 min |
| Population density | 45.2 / sq miThis ZIP45.2 / sq mi |
Business and tax activity
| Business establishments | 242This ZIP242 |
|---|---|
| Employees | 3,381This ZIP3,381 |
| Annual payroll | $162,932,000This ZIP$162,932,000 |
| Tax returns filed | 2,310This ZIP2,310 |
| Total adjusted gross income | $251,410,000This ZIP$251,410,000 |
Land area
| Land area | 112.60 sq miThis ZIP112.60 sq mi |
|---|---|
| Water area | 0.08 sq miThis ZIP0.08 sq mi |
Counties 51247 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Sioux County | 95.5% |
| Lyon County | 4.5% |
Other place names in 51247
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 51247
| ZIP | City | Distance |
|---|---|---|
57027 | Fairview, SD | 9.1 mi |
51235 | Doon, IA | 9.3 mi |
51239 | Hull, IA | 9.6 mi |
51250 | Sioux Center, IA | 9.7 mi |
51240 | Inwood, IA | 10.0 mi |
51230 | Alvord, IA | 11.3 mi |
57034 | Hudson, SD | 11.3 mi |
51023 | Hawarden, IA | 14.4 mi |
57013 | Canton, SD | 15.7 mi |
51027 | Ireton, IA | 15.8 mi |
Find every ZIP code within 10 miles of 51247 →
Questions about this ZIP code
Where is ZIP code 51247?
51247 is in Rock Valley, Iowa, in Sioux County. Its published point location is 43.1938, -96.3381.
What county is 51247 in?
51247 spans 2 counties: Sioux County and Lyon County. Most of it falls in Sioux 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 51247?
Rock Valley uses area code 712, from NANPA's telephone records.
What time zone is 51247 in?
51247 uses America/Chicago.
How many people live in 51247?
About 5,094 people live in ZIP code 51247, in 1,825 households, at 45.2 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 51247?
$78,358 a year, against $75,059 across Iowa.
What ZIP codes are near 51247?
The closest are 57027 (9.1 mi), 51235 (9.3 mi), 51239 (9.6 mi), 51250 (9.7 mi) and 51240 (10 mi).
Is 51247 a PO Box ZIP code?
51247 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “51247 ZIP Code — Rock Valley, Iowa (Sioux County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51247
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/51247.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.