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Where 21051 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 21051 into a pocket calculator and turn it upside down: ISOIZ — not quite a word, sorry.
- ➕ As a number, 21,051 = 3 × 3 × 2339. Its digits add up to 9, a total 375 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001000111011 - 🏠 Its numerical neighbours: 21050 (Forest Hill, MD, 8 mi away) and 21052 (Fort Howard, MD, 19 mi away).
- 🔄 Backwards, 21051 becomes 15012 — and that is a real ZIP code: Belle Vernon, PA, 184 miles away.
- 👥 37 other ZIP codes are made of exactly the same digits (01152, 01521, 02115, 02151, 10125, 10152, …). The farthest-flung twin is 51102 in Sioux City, IA, 1,054 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 84%.
- 🎯1,174 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21051 and you would come out at 39.47°S, 103.54°E — 863 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 0.398 square miles of land, 21051 is bigger than 4% of ZIP codes — about 193 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 172This ZIP172 |
|---|---|
| Households | 59This ZIP59 |
| Housing units | 59This ZIP59 |
| Median age | 44.5This ZIP44.5Maryland39.4US 38.9 |
| Median household income | $232,721This ZIP$232,721Maryland$103,678US $80,734 |
| Median home value | $698,500This ZIP$698,500Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 38.5%This ZIP38.5% |
| Population density | 432.2 / sq miThis ZIP432.2 / sq mi |
Business and tax activity
| Business establishments | 10This ZIP10 |
|---|---|
| Employees | 105This ZIP105 |
| Annual payroll | $5,609,000This ZIP$5,609,000 |
| Tax returns filed | 170This ZIP170 |
| Total adjusted gross income | $24,214,000This ZIP$24,214,000 |
Land area
| Land area | 0.40 sq miThis ZIP0.40 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
ZIP codes near 21051
| ZIP | City | Distance |
|---|---|---|
21082 | Hydes, MD | 1.0 mi |
21087 | Kingsville, MD | 2.8 mi |
21013 | Baldwin, MD | 3.3 mi |
21057 | Glen Arm, MD | 3.4 mi |
21092 | Long Green, MD | 3.6 mi |
21047 | Fallston, MD | 3.9 mi |
21156 | Upper Falls, MD | 4.1 mi |
21018 | Benson, MD | 4.5 mi |
21128 | Perry Hall, MD | 4.7 mi |
21085 | Joppa, MD | 5.6 mi |
Find every ZIP code within 10 miles of 21051 →
Questions about this ZIP code
Where is ZIP code 21051?
21051 is in Fork, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.4727, -76.4558.
What county is 21051 in?
21051 lies in Baltimore County.
What area code is 21051?
Fork uses area codes 410, 443 and 667, from NANPA's telephone records.
What time zone is 21051 in?
21051 uses America/New_York.
How many people live in 21051?
About 172 people live in ZIP code 21051, in 59 households, at 432.2 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 21051?
$232,721 a year, against $103,678 across Maryland.
What ZIP codes are near 21051?
The closest are 21082 (1 mi), 21087 (2.8 mi), 21013 (3.3 mi), 21057 (3.4 mi) and 21092 (3.6 mi).
Is 21051 a PO Box ZIP code?
21051 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21051 ZIP Code — Fork, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21051
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21051.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.