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Where 63621 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 63621 into a pocket calculator and turn it upside down: IZgEg — not quite a word, sorry.
- ➕ As a number, 63,621 = 3 × 3 × 7069. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1111100010000101 - 🏠 Its numerical neighbours: 63620 (Annapolis, MO, 8 mi away) and 63622 (Belgrade, MO, 29 mi away).
- 🔄 Backwards, 63621 becomes 12636, which is not a ZIP code at all.
- 👥 27 other ZIP codes are made of exactly the same digits (13626, 13662, 16236, 16263, 16326, 16362, …). The farthest-flung twin is 13662 in Massena, NY, 962 miles away.
- 🧭 Farther south than 62% of all ZIP codes, and farther west than 58%.
- 🎯462 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 63621 and you would come out at 37.47°S, 89.43°E — 1,260 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 45m of daylight. Shortest: 9h 34m.
- 📏 At 76.7 square miles of land, 63621 is bigger than 71% of ZIP codes — room for about 58 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,632This ZIP1,632 |
|---|---|
| Households | 607This ZIP607 |
| Housing units | 659This ZIP659 |
| Median age | 48.0This ZIP48.0Missouri39.0US 38.9 |
| Median household income | $87,825This ZIP$87,825Missouri$70,702US $80,734 |
| Median home value | $175,300This ZIP$175,300Missouri$230,300US $332,700 |
| Bachelor's degree or higher | 14.2%This ZIP14.2% |
| Mean commute | 24.3 minThis ZIP24.3 min |
| Population density | 21.3 / sq miThis ZIP21.3 / sq mi |
Business and tax activity
| Business establishments | 24This ZIP24 |
|---|---|
| Employees | 130This ZIP130 |
| Annual payroll | $2,722,000This ZIP$2,722,000 |
| Tax returns filed | 470This ZIP470 |
| Total adjusted gross income | $25,135,000This ZIP$25,135,000 |
Land area
| Land area | 76.72 sq miThis ZIP76.72 sq mi |
|---|---|
| Water area | 0.34 sq miThis ZIP0.34 sq mi |
Counties 63621 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Iron County | 68.7% |
| Madison County | 31.3% |
Other place names in 63621
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 63621
| ZIP | City | Distance |
|---|---|---|
63620 | Annapolis, MO | 8.0 mi |
63650 | Ironton, MO | 10.0 mi |
63663 | Pilot Knob, MO | 11.3 mi |
63636 | Des Arc, MO | 12.5 mi |
63675 | Vulcan, MO | 13.2 mi |
63645 | Fredericktown, MO | 14.0 mi |
63656 | Middle Brook, MO | 15.0 mi |
63654 | Lesterville, MO | 16.0 mi |
63637 | Doe Run, MO | 16.6 mi |
63950 | Lodi, MO | 16.8 mi |
Find every ZIP code within 10 miles of 63621 →
Questions about this ZIP code
Where is ZIP code 63621?
63621 is in Arcadia, Missouri, in Iron County. Its published point location is 37.4750, -90.5660.
What county is 63621 in?
63621 spans 2 counties: Iron County and Madison County. Most of it falls in Iron 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 63621?
Arcadia uses area code 573, from NANPA's telephone records.
What time zone is 63621 in?
63621 uses America/Chicago.
How many people live in 63621?
About 1,632 people live in ZIP code 63621, in 607 households, at 21.3 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 63621?
$87,825 a year, against $70,702 across Missouri.
What ZIP codes are near 63621?
The closest are 63620 (8 mi), 63650 (10 mi), 63663 (11.3 mi), 63636 (12.5 mi) and 63675 (13.2 mi).
Is 63621 a PO Box ZIP code?
63621 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “63621 ZIP Code — Arcadia, Missouri (Iron County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/63621
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/63621.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.