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Where 21222 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 21222 into a pocket calculator and turn it upside down: ZZZIZ — not quite a word, sorry.
- ➕ As a number, 21,222 = 2 × 3 × 3 × 3 × 3 × 131. Its digits add up to 9, a total 375 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001011100110 - 🏠 Its numerical neighbours: 21221 (Essex, MD, 4 mi away) and 21223 (Baltimore, MD, 9 mi away).
- 🔄 Backwards, 21222 becomes 22212 — and that is a real ZIP code: Arlington, VA, 42 miles away.
- 👥 3 other ZIP codes are made of exactly the same digits (12222, 22122, 22212). The farthest-flung twin is 12222 in Albany, NY, 274 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
- 🎯1,174 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21222 and you would come out at 39.26°S, 103.50°E — 857 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
- 📏 At 11.5 square miles of land, 21222 is bigger than 29% of ZIP codes — room for about 8.7 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 59,407This ZIP59,407 |
|---|---|
| Households | 22,512This ZIP22,512 |
| Housing units | 23,982This ZIP23,982 |
| Median age | 36.4This ZIP36.4Maryland39.4US 38.9 |
| Median household income | $64,141This ZIP$64,141Maryland$103,678US $80,734 |
| Median home value | $215,900This ZIP$215,900Maryland$419,900US $332,700 |
| Median gross rent | $1,444This ZIP$1,444Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 14.9%This ZIP14.9% |
| Mean commute | 25.7 minThis ZIP25.7 min |
| Population density | 5,164.5 / sq miThis ZIP5,164.5 / sq mi |
Business and tax activity
| Business establishments | 767This ZIP767 |
|---|---|
| Employees | 10,114This ZIP10,114 |
| Annual payroll | $526,286,000This ZIP$526,286,000 |
| Tax returns filed | 27,830This ZIP27,830 |
| Total adjusted gross income | $1,383,872,000This ZIP$1,383,872,000 |
Land area
| Land area | 11.50 sq miThis ZIP11.50 sq mi |
|---|---|
| Water area | 2.22 sq miThis ZIP2.22 sq mi |
Counties 21222 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Baltimore County | 93.5% |
| Baltimore city | 6.5% |
Other place names in 21222
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21222
| ZIP | City | Distance |
|---|---|---|
21224 | Baltimore, MD | 2.6 mi |
21221 | Essex, MD | 3.7 mi |
21219 | Sparrows Point, MD | 4.0 mi |
21205 | Baltimore, MD | 4.5 mi |
21052 | Fort Howard, MD | 5.1 mi |
21226 | Curtis Bay, MD | 5.3 mi |
21237 | Rosedale, MD | 5.3 mi |
21231 | Baltimore, MD | 5.4 mi |
21287 | Baltimore, MD | 5.5 mi |
21213 | Baltimore, MD | 5.6 mi |
Find every ZIP code within 10 miles of 21222 →
Questions about this ZIP code
Where is ZIP code 21222?
21222 is in Dundalk, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2646, -76.4956.
What county is 21222 in?
21222 spans 2 counties: Baltimore County and Baltimore city. Most of it falls in Baltimore 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 21222?
Dundalk uses area codes 443, 410 and 667, from NANPA's telephone records.
What time zone is 21222 in?
21222 uses America/New_York.
How many people live in 21222?
About 59,407 people live in ZIP code 21222, in 22,512 households, at 5,164.5 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 21222?
$64,141 a year, against $103,678 across Maryland.
What ZIP codes are near 21222?
The closest are 21224 (2.6 mi), 21221 (3.7 mi), 21219 (4 mi), 21205 (4.5 mi) and 21052 (5.1 mi).
Is 21222 a PO Box ZIP code?
21222 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21222 ZIP Code — Dundalk, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21222
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21222.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.