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Where 21130 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 21130 into a pocket calculator and turn it upside down: OEIIZ — not quite a word, sorry.
- ➕ As a number, 21,130 = 2 × 5 × 2113. Its digits add up to 7, a total 150 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001010001010 - 🏠 Its numerical neighbours: 21128 (Perry Hall, MD, 15 mi away) and 21131 (Phoenix, MD, 21 mi away).
- 🔄 Backwards, 21130 becomes 03112, which is not a ZIP code at all.
- 👥 31 other ZIP codes are made of exactly the same digits (02113, 02131, 10123, 10132, 10213, 10312, …). The farthest-flung twin is 32110 in Bunnell, FL, 752 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 84%.
- 🎯1,188 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21130 and you would come out at 39.47°S, 103.81°E — 851 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 0.548 square miles of land, 21130 is bigger than 6% of ZIP codes — about 265 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 112This ZIP112 |
|---|---|
| Households | 71This ZIP71 |
| Housing units | 71This ZIP71 |
| Median age | 21.7This ZIP21.7Maryland39.4US 38.9 |
| Median household income | $17,336This ZIP$17,336Maryland$103,678US $80,734 |
| Bachelor's degree or higher | 0.0% |
| Population density | 204.4 / sq miThis ZIP204.4 / sq mi |
Business and tax activity
| Business establishments | 11This ZIP11 |
|---|---|
| Employees | 1,354This ZIP1,354 |
| Annual payroll | $68,810,000This ZIP$68,810,000 |
Land area
| Land area | 0.55 sq miThis ZIP0.55 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 21130
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21130
| ZIP | City | Distance |
|---|---|---|
21001 | Aberdeen, MD | 2.1 mi |
21017 | Belcamp, MD | 2.4 mi |
21005 | Aberdeen Proving Ground, MD | 4.2 mi |
21009 | Abingdon, MD | 5.1 mi |
21040 | Edgewood, MD | 5.9 mi |
21078 | Havre De Grace, MD | 6.4 mi |
21028 | Churchville, MD | 7.1 mi |
21015 | Bel Air, MD | 7.3 mi |
21010 | Gunpowder, MD | 8.0 mi |
21902 | Perry Point, MD | 8.6 mi |
Find every ZIP code within 10 miles of 21130 →
Questions about this ZIP code
Where is ZIP code 21130?
21130 is in Perryman, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.4748, -76.1894.
What county is 21130 in?
21130 lies in Harford County.
What area code is 21130?
Perryman uses area codes 667, 443 and 410, from NANPA's telephone records.
What time zone is 21130 in?
21130 uses America/New_York.
How many people live in 21130?
About 112 people live in ZIP code 21130, in 71 households, at 204.4 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 21130?
$17,336 a year, against $103,678 across Maryland.
What ZIP codes are near 21130?
The closest are 21001 (2.1 mi), 21017 (2.4 mi), 21005 (4.2 mi), 21009 (5.1 mi) and 21040 (5.9 mi).
Is 21130 a PO Box ZIP code?
21130 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21130 ZIP Code — Perryman, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21130
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21130.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.