21209
ZIP 21209 is in Baltimore, Maryland, mostly in Baltimore County; area codes 410, 443 and 667; Eastern time. Baltimore has 42 ZIP codes in all.
- Type
- Standard
- Time zone
- America/New_York
- County
- Baltimore +1 more
- Metro area
- Baltimore-Columbia-Towson, MD
- Population
- 30,126
- Coordinates
- 39.3753, -76.6626
Weather right now
Asking the National Weather Service…
Where 21209 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 21209 into a pocket calculator and turn it upside down: GOZIZ — not quite a word, sorry.
- ➕ As a number, 21,209 = 127 × 167. Its digits add up to 14, a total 1,416 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001011011001 - 🏠 Its numerical neighbours: 21208 (Pikesville, MD, 3 mi away) and 21210 (Baltimore, MD, 2 mi away).
- 🔄 Backwards, 21209 becomes 90212 — and that is a real ZIP code: Beverly Hills, CA, 2,320 miles away.
- 👥 36 other ZIP codes are made of exactly the same digits (01229, 01922, 02129, 02912, 02921, 09212, …). The farthest-flung twin is 09212 in APO AE, a military post office, 4,024 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
- 🎯1,164 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21209 and you would come out at 39.38°S, 103.34°E — 869 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 6.5 square miles of land, 21209 is bigger than 22% of ZIP codes — room for about 4.9 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 30,126This ZIP30,126 |
|---|---|
| Households | 11,621This ZIP11,621 |
| Housing units | 12,071This ZIP12,071 |
| Median age | 35.6This ZIP35.6Maryland39.4US 38.9 |
| Median household income | $91,437This ZIP$91,437Maryland$103,678US $80,734 |
| Median home value | $440,800This ZIP$440,800Maryland$419,900US $332,700 |
| Median gross rent | $1,655This ZIP$1,655Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 60.7%This ZIP60.7% |
| Mean commute | 24.0 minThis ZIP24.0 min |
| Population density | 4,664.9 / sq miThis ZIP4,664.9 / sq mi |
Business and tax activity
| Business establishments | 777This ZIP777 |
|---|---|
| Employees | 9,386This ZIP9,386 |
| Annual payroll | $645,837,000This ZIP$645,837,000 |
| Tax returns filed | 12,490This ZIP12,490 |
| Total adjusted gross income | $1,947,364,000This ZIP$1,947,364,000 |
Land area
| Land area | 6.46 sq miThis ZIP6.46 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Counties 21209 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 | 55.6% |
| Baltimore city | 44.4% |
Other place names in 21209
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21209
| ZIP | City | Distance |
|---|---|---|
21022 | Brooklandville, MD | 1.6 mi |
21210 | Baltimore, MD | 1.9 mi |
21215 | Baltimore, MD | 2.3 mi |
21139 | Riderwood, MD | 2.5 mi |
21285 | Towson, MD | 2.6 mi |
21212 | Baltimore, MD | 2.6 mi |
21204 | Towson, MD | 2.9 mi |
21252 | Towson, MD | 3.0 mi |
21282 | Pikesville, MD | 3.2 mi |
21208 | Pikesville, MD | 3.3 mi |
Find every ZIP code within 10 miles of 21209 →
Questions about this ZIP code
Where is ZIP code 21209?
21209 is in Baltimore, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.3753, -76.6626.
What county is 21209 in?
21209 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 21209?
Baltimore uses area codes 410, 443 and 667, from NANPA's telephone records.
What time zone is 21209 in?
21209 uses America/New_York.
How many people live in 21209?
About 30,126 people live in ZIP code 21209, in 11,621 households, at 4,664.9 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 21209?
$91,437 a year, against $103,678 across Maryland.
What ZIP codes are near 21209?
The closest are 21022 (1.6 mi), 21210 (1.9 mi), 21215 (2.3 mi), 21139 (2.5 mi) and 21285 (2.6 mi).
Is 21209 a PO Box ZIP code?
21209 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21209 ZIP Code — Baltimore, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21209
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21209.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.