21239
ZIP 21239 is in Baltimore, Maryland, mostly in Baltimore City; area codes 410, 443 and 667; Eastern time. Baltimore has 42 ZIP codes in all.
- Type
- Standard
- Time zone
- America/New_York
- County
- Baltimore city +1 more
- Metro area
- Baltimore-Columbia-Towson, MD
- Population
- 27,346
- Coordinates
- 39.3652, -76.5871
Weather right now
Asking the National Weather Service…
Where 21239 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 21239 into a pocket calculator and turn it upside down: GEZIZ — not quite a word, sorry.
- ➕ As a number, 21,239 = 67 × 317. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001011110111 - 🏠 Its numerical neighbours: 21237 (Rosedale, MD, 5 mi away) and 21240 (Baltimore, MD, 14 mi away).
- 🔄 Backwards, 21239 becomes 93212 — and that is a real ZIP code: Corcoran, CA, 2,339 miles away.
- 👥 27 other ZIP codes are made of exactly the same digits (12239, 12923, 12932, 22193, 22931, 23129, …). The farthest-flung twin is 93212 in Corcoran, CA, 2,339 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
- 🎯1,168 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21239 and you would come out at 39.37°S, 103.41°E — 865 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 2.9 square miles of land, 21239 is bigger than 14% of ZIP codes — room for about 2.2 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 27,346This ZIP27,346 |
|---|---|
| Households | 12,080This ZIP12,080 |
| Housing units | 12,755This ZIP12,755 |
| Median age | 37.1This ZIP37.1Maryland39.4US 38.9 |
| Median household income | $62,650This ZIP$62,650Maryland$103,678US $80,734 |
| Median home value | $207,400This ZIP$207,400Maryland$419,900US $332,700 |
| Median gross rent | $1,367This ZIP$1,367Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 32.7%This ZIP32.7% |
| Mean commute | 27.1 minThis ZIP27.1 min |
| Population density | 9,329.9 / sq miThis ZIP9,329.9 / sq mi |
Business and tax activity
| Business establishments | 199This ZIP199 |
|---|---|
| Employees | 5,093This ZIP5,093 |
| Annual payroll | $429,820,000This ZIP$429,820,000 |
| Tax returns filed | 13,000This ZIP13,000 |
| Total adjusted gross income | $679,173,000This ZIP$679,173,000 |
Land area
| Land area | 2.93 sq miThis ZIP2.93 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
Counties 21239 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Baltimore city | 73.3% |
| Baltimore County | 26.7% |
Other place names in 21239
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21239
| ZIP | City | Distance |
|---|---|---|
21251 | Baltimore, MD | 1.1 mi |
21212 | Baltimore, MD | 1.5 mi |
21214 | Baltimore, MD | 1.5 mi |
21285 | Towson, MD | 2.2 mi |
21252 | Towson, MD | 2.4 mi |
21218 | Baltimore, MD | 2.5 mi |
21210 | Baltimore, MD | 2.6 mi |
21284 | Towson, MD | 2.6 mi |
21206 | Baltimore, MD | 3.2 mi |
21286 | Towson, MD | 3.3 mi |
Find every ZIP code within 10 miles of 21239 →
Questions about this ZIP code
Where is ZIP code 21239?
21239 is in Baltimore, Maryland, in Baltimore city, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.3652, -76.5871.
What county is 21239 in?
21239 spans 2 counties: Baltimore city and Baltimore County. Most of it falls in Baltimore city, 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 21239?
Baltimore uses area codes 410, 443 and 667, from NANPA's telephone records.
What time zone is 21239 in?
21239 uses America/New_York.
How many people live in 21239?
About 27,346 people live in ZIP code 21239, in 12,080 households, at 9,329.9 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 21239?
$62,650 a year, against $103,678 across Maryland.
What ZIP codes are near 21239?
The closest are 21251 (1.1 mi), 21212 (1.5 mi), 21214 (1.5 mi), 21285 (2.2 mi) and 21252 (2.4 mi).
Is 21239 a PO Box ZIP code?
21239 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21239 ZIP Code — Baltimore, Maryland (Baltimore City).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21239
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21239.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.