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Where 50138 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 50138 into a pocket calculator and turn it upside down: BEIOS — not quite a word, sorry.
- ➕ As a number, 50,138 = 2 × 11 × 43 × 53. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100001111011010 - 🏠 Its numerical neighbours: 50137 (Killduff, IA, 23 mi away) and 50139 (Lacona, IA, 15 mi away).
- 🔄 Backwards, 50138 becomes 83105, which is not a ZIP code at all.
- 👥 55 other ZIP codes are made of exactly the same digits (01538, 01583, 01835, 01853, 03581, 03815, …). The farthest-flung twin is 83501 in Lewiston, ID, 1,231 miles away.
- 🧭 Farther north than 69% of all ZIP codes, and farther west than 63%.
- 🎯305 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 50138 and you would come out at 41.30°S, 86.89°E — 979 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
- 📏 At 168.2 square miles of land, 50138 is bigger than 88% of ZIP codes — room for about 128 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 11,117This ZIP11,117 |
|---|---|
| Households | 4,663This ZIP4,663 |
| Housing units | 5,133This ZIP5,133 |
| Median age | 42.9This ZIP42.9Iowa38.6US 38.9 |
| Median household income | $74,693This ZIP$74,693Iowa$75,059US $80,734 |
| Median home value | $196,700This ZIP$196,700Iowa$208,000US $332,700 |
| Median gross rent | $815This ZIP$815Iowa$972US $1,413 |
| Bachelor's degree or higher | 28.0%This ZIP28.0% |
| Mean commute | 23.5 minThis ZIP23.5 min |
| Population density | 66.1 / sq miThis ZIP66.1 / sq mi |
Business and tax activity
| Business establishments | 240This ZIP240 |
|---|---|
| Employees | 3,841This ZIP3,841 |
| Annual payroll | $195,533,000This ZIP$195,533,000 |
| Tax returns filed | 5,280This ZIP5,280 |
| Total adjusted gross income | $362,132,000This ZIP$362,132,000 |
Land area
| Land area | 168.15 sq miThis ZIP168.15 sq mi |
|---|---|
| Water area | 7.65 sq miThis ZIP7.65 sq mi |
Other place names in 50138
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 50138
| ZIP | City | Distance |
|---|---|---|
50062 | Melcher Dallas, IA | 8.5 mi |
50057 | Columbia, IA | 8.6 mi |
50119 | Harvey, IA | 8.7 mi |
50163 | Melcher Dallas, IA | 8.9 mi |
50225 | Pleasantville, IA | 10.2 mi |
50116 | Hamilton, IA | 10.8 mi |
50256 | Tracy, IA | 10.9 mi |
50214 | Otley, IA | 11.8 mi |
50044 | Bussey, IA | 12.6 mi |
50219 | Pella, IA | 13.6 mi |
Find every ZIP code within 10 miles of 50138 →
Questions about this ZIP code
Where is ZIP code 50138?
50138 is in Knoxville, Iowa, in Marion County, part of the Pella, IA micropolitan area. Its published point location is 41.3029, -93.1077.
What county is 50138 in?
50138 lies in Marion County.
What area code is 50138?
Knoxville uses area code 641, from NANPA's telephone records.
What time zone is 50138 in?
50138 uses America/Chicago.
How many people live in 50138?
About 11,117 people live in ZIP code 50138, in 4,663 households, at 66.1 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 50138?
$74,693 a year, against $75,059 across Iowa.
What ZIP codes are near 50138?
The closest are 50062 (8.5 mi), 50057 (8.6 mi), 50119 (8.7 mi), 50163 (8.9 mi) and 50225 (10.2 mi).
Is 50138 a PO Box ZIP code?
50138 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “50138 ZIP Code — Knoxville, Iowa (Marion County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50138
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/50138.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.