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Where 21561 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 21561 into a pocket calculator and turn it upside down: IgSIZ — not quite a word, sorry.
- ➕ As a number, 21,561 = 3 × 7187. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010000111001 - 🏠 Its numerical neighbours: 21560 (Spring Gap, MD, 27 mi away) and 21562 (Westernport, MD, 8 mi away).
- 🔄 Backwards, 21561 becomes 16512 — and that is a real ZIP code: Erie, PA, 188 miles away.
- 👥 23 other ZIP codes are made of exactly the same digits (11256, 12156, 12165, 12516, 12561, 15126, …). The farthest-flung twin is 56211 in Beardsley, MN, 983 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 76%.
- 🎯1,029 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21561 and you would come out at 39.49°S, 100.81°E — 990 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 23m.
- 📏 At 101.9 square miles of land, 21561 is bigger than 78% of ZIP codes — room for about 77 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,412This ZIP2,412 |
|---|---|
| Households | 1,107This ZIP1,107 |
| Housing units | 2,560This ZIP2,560 |
| Median age | 57.0This ZIP57.0Maryland39.4US 38.9 |
| Median household income | $73,858This ZIP$73,858Maryland$103,678US $80,734 |
| Median home value | $328,700This ZIP$328,700Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 38.0%This ZIP38.0% |
| Mean commute | 31.1 minThis ZIP31.1 min |
| Population density | 23.7 / sq miThis ZIP23.7 / sq mi |
Business and tax activity
| Business establishments | 36This ZIP36 |
|---|---|
| Employees | 100This ZIP100 |
| Annual payroll | $5,230,000This ZIP$5,230,000 |
| Tax returns filed | 1,120This ZIP1,120 |
| Total adjusted gross income | $100,941,000This ZIP$100,941,000 |
Land area
| Land area | 101.85 sq miThis ZIP101.85 sq mi |
|---|---|
| Water area | 3.50 sq miThis ZIP3.50 sq mi |
Other place names in 21561
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21561
| ZIP | City | Distance |
|---|---|---|
21538 | Kitzmiller, MD | 5.9 mi |
21523 | Bloomington, MD | 6.2 mi |
21540 | Luke, MD | 7.3 mi |
21522 | Bittinger, MD | 7.8 mi |
26750 | Piedmont, WV | 8.0 mi |
21562 | Westernport, MD | 8.4 mi |
21521 | Barton, MD | 8.8 mi |
21541 | Mc Henry, MD | 10.5 mi |
26717 | Elk Garden, WV | 10.9 mi |
21536 | Grantsville, MD | 11.5 mi |
Find every ZIP code within 10 miles of 21561 →
Questions about this ZIP code
Where is ZIP code 21561?
21561 is in Swanton, Maryland, in Garrett County. Its published point location is 39.4916, -79.1944.
What county is 21561 in?
21561 lies in Garrett County.
What area code is 21561?
Swanton uses area codes 240 and 301, from NANPA's telephone records.
What time zone is 21561 in?
21561 uses America/New_York.
How many people live in 21561?
About 2,412 people live in ZIP code 21561, in 1,107 households, at 23.7 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 21561?
$73,858 a year, against $103,678 across Maryland.
What ZIP codes are near 21561?
The closest are 21538 (5.9 mi), 21523 (6.2 mi), 21540 (7.3 mi), 21522 (7.8 mi) and 26750 (8 mi).
Is 21561 a PO Box ZIP code?
21561 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21561 ZIP Code — Swanton, Maryland (Garrett County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21561
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21561.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.