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Where 50156 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 50156 into a pocket calculator and turn it upside down: gSIOS — not quite a word, sorry.
- ➕ As a number, 50,156 = 2 × 2 × 12539. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100001111101100 - 🏠 Its numerical neighbours: 50155 (Macksburg, IA, 52 mi away) and 50157 (Malcom, IA, 65 mi away).
- 🔄 Backwards, 50156 becomes 65105 — and that is a real ZIP code: Jefferson City, MO, 245 miles away.
- 👥 34 other ZIP codes are made of exactly the same digits (01655, 05156, 05651, 06155, 06515, 15056, …). The farthest-flung twin is 01655 in Worcester, MA, 1,120 miles away.
- 🧭 Farther north than 74% of all ZIP codes, and farther west than 65%.
- 🎯288 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 50156 and you would come out at 41.90°S, 86.20°E — 925 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 14m of daylight. Shortest: 9h 07m.
- 📏 At 88.5 square miles of land, 50156 is bigger than 75% of ZIP codes — room for about 67 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 4,575This ZIP4,575 |
|---|---|
| Households | 1,791This ZIP1,791 |
| Housing units | 1,914This ZIP1,914 |
| Median age | 41.1This ZIP41.1Iowa38.6US 38.9 |
| Median household income | $98,054This ZIP$98,054Iowa$75,059US $80,734 |
| Median home value | $243,800This ZIP$243,800Iowa$208,000US $332,700 |
| Median gross rent | $768This ZIP$768Iowa$972US $1,413 |
| Bachelor's degree or higher | 29.8%This ZIP29.8% |
| Mean commute | 29.7 minThis ZIP29.7 min |
| Population density | 51.7 / sq miThis ZIP51.7 / sq mi |
Business and tax activity
| Business establishments | 90This ZIP90 |
|---|---|
| Employees | 462This ZIP462 |
| Annual payroll | $19,042,000This ZIP$19,042,000 |
| Tax returns filed | 2,170This ZIP2,170 |
| Total adjusted gross income | $181,582,000This ZIP$181,582,000 |
Land area
| Land area | 88.49 sq miThis ZIP88.49 sq mi |
|---|---|
| Water area | 1.71 sq miThis ZIP1.71 sq mi |
Counties 50156 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Boone County | 77.4% |
| Polk County | 16.0% |
| Dallas County | 6.6% |
Other place names in 50156
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 50156
| ZIP | City | Distance |
|---|---|---|
50152 | Luther, IA | 4.9 mi |
50243 | Sheldahl, IA | 5.9 mi |
50276 | Woodward, IA | 6.8 mi |
50134 | Kelley, IA | 7.1 mi |
50244 | Slater, IA | 8.4 mi |
50226 | Polk City, IA | 8.7 mi |
50109 | Granger, IA | 8.8 mi |
50124 | Huxley, IA | 10.2 mi |
50013 | Ames, IA | 10.9 mi |
50014 | Ames, IA | 11.6 mi |
Find every ZIP code within 10 miles of 50156 →
Questions about this ZIP code
Where is ZIP code 50156?
50156 is in Madrid, Iowa, in Boone County, part of the Ames, IA metropolitan area. Its published point location is 41.8983, -93.8012.
What county is 50156 in?
50156 spans 3 counties: Boone County, Polk County and Dallas County. Most of it falls in Boone 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 50156?
Madrid uses area code 515, from NANPA's telephone records.
What time zone is 50156 in?
50156 uses America/Chicago.
How many people live in 50156?
About 4,575 people live in ZIP code 50156, in 1,791 households, at 51.7 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 50156?
$98,054 a year, against $75,059 across Iowa.
What ZIP codes are near 50156?
The closest are 50152 (4.9 mi), 50243 (5.9 mi), 50276 (6.8 mi), 50134 (7.1 mi) and 50244 (8.4 mi).
Is 50156 a PO Box ZIP code?
50156 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “50156 ZIP Code — Madrid, Iowa (Boone County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50156
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/50156.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.