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Where 21550 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 21550 into a pocket calculator and turn it upside down: OSSIZ — not quite a word, sorry.
- ➕ As a number, 21,550 = 2 × 5 × 5 × 431. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010000101110 - 🏠 Its numerical neighbours: 21545 (Mount Savage, MD, 36 mi away) and 21555 (Oldtown, MD, 46 mi away).
- 🔄 Backwards, 21550 becomes 05512, which is not a ZIP code at all.
- 👥 36 other ZIP codes are made of exactly the same digits (01255, 01525, 02155, 05152, 05251, 10552, …). The farthest-flung twin is 51250 in Sioux Center, IA, 908 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 76%.
- 🎯1,020 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21550 and you would come out at 39.39°S, 100.61°E — 997 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 205.5 square miles of land, 21550 is bigger than 91% of ZIP codes — room for about 156 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 13,691This ZIP13,691 |
|---|---|
| Households | 6,100This ZIP6,100 |
| Housing units | 8,529This ZIP8,529 |
| Median age | 49.4This ZIP49.4Maryland39.4US 38.9 |
| Median household income | $64,921This ZIP$64,921Maryland$103,678US $80,734 |
| Median home value | $233,300This ZIP$233,300Maryland$419,900US $332,700 |
| Median gross rent | $803This ZIP$803Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 27.6%This ZIP27.6% |
| Mean commute | 19.3 minThis ZIP19.3 min |
| Population density | 66.6 / sq miThis ZIP66.6 / sq mi |
Business and tax activity
| Business establishments | 521This ZIP521 |
|---|---|
| Employees | 6,184This ZIP6,184 |
| Annual payroll | $262,873,000This ZIP$262,873,000 |
| Tax returns filed | 6,470This ZIP6,470 |
| Total adjusted gross income | $425,064,000This ZIP$425,064,000 |
Land area
| Land area | 205.47 sq miThis ZIP205.47 sq mi |
|---|---|
| Water area | 3.44 sq miThis ZIP3.44 sq mi |
Other place names in 21550
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21550
| ZIP | City | Distance |
|---|---|---|
26720 | Gormania, WV | 8.5 mi |
21538 | Kitzmiller, MD | 9.1 mi |
26764 | Terra Alta, WV | 9.9 mi |
21541 | Mc Henry, MD | 10.4 mi |
26705 | Aurora, WV | 10.5 mi |
26717 | Elk Garden, WV | 11.9 mi |
26716 | Eglon, WV | 12.1 mi |
21561 | Swanton, MD | 12.6 mi |
26707 | Bayard, WV | 12.7 mi |
26739 | Mount Storm, WV | 14.1 mi |
Find every ZIP code within 10 miles of 21550 →
Questions about this ZIP code
Where is ZIP code 21550?
21550 is in Oakland, Maryland, in Garrett County. Its published point location is 39.3917, -79.3924.
What county is 21550 in?
21550 lies in Garrett County.
What area code is 21550?
Oakland uses area codes 301, 240 and 227, from NANPA's telephone records.
What time zone is 21550 in?
21550 uses America/New_York.
How many people live in 21550?
About 13,691 people live in ZIP code 21550, in 6,100 households, at 66.6 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 21550?
$64,921 a year, against $103,678 across Maryland.
What ZIP codes are near 21550?
The closest are 26720 (8.5 mi), 21538 (9.1 mi), 26764 (9.9 mi), 21541 (10.4 mi) and 26705 (10.5 mi).
Is 21550 a PO Box ZIP code?
21550 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21550 ZIP Code — Oakland, Maryland (Garrett County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21550
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21550.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.