21543
ZIP 21543 is Midlothian, Maryland, in Allegany County; area codes 240 and 301; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Allegany
- Metro area
- Cumberland, MD-WV
- Population
- 185
- Coordinates
- 39.6436, -78.9610
Weather right now
Asking the National Weather Service…
Where 21543 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 21543 into a pocket calculator and turn it upside down: EhSIZ — not quite a word, sorry.
- ➕ As a number, 21,543 = 3 × 43 × 167. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010000100111 - 🏠 Its numerical neighbours: 21542 (Midland, MD, 4 mi away) and 21545 (Mount Savage, MD, 7 mi away).
- 🔄 Backwards, 21543 becomes 34512, which is not a ZIP code at all.
- 👥 66 other ZIP codes are made of exactly the same digits (12345, 12435, 12453, 12534, 12543, 13425, …). The farthest-flung twin is 51234 in Boyden, IA, 915 miles away.
- 🧭 Farther north than 53% of all ZIP codes, and farther east than 76%.
- 🎯1,040 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21543 and you would come out at 39.64°S, 101.04°E — 984 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 22m.
- 📏 At 2.5 square miles of land, 21543 is bigger than 13% of ZIP codes — room for about 1.9 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 185This ZIP185 |
|---|---|
| Households | 122This ZIP122 |
| Housing units | 122This ZIP122 |
| Median age | 30.9This ZIP30.9Maryland39.4US 38.9 |
| Median home value | $190,200This ZIP$190,200Maryland$419,900US $332,700 |
| Median gross rent | $775This ZIP$775Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 15.4%This ZIP15.4% |
| Population density | 75.1 / sq miThis ZIP75.1 / sq mi |
Land area
| Land area | 2.47 sq miThis ZIP2.47 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
Other place names in 21543
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21543
| ZIP | City | Distance |
|---|---|---|
21532 | Frostburg, MD | 1.3 mi |
21528 | Eckhart Mines, MD | 3.2 mi |
21542 | Midland, MD | 3.7 mi |
21539 | Lonaconing, MD | 4.2 mi |
21545 | Mount Savage, MD | 7.0 mi |
21505 | Cumberland, MD | 7.1 mi |
21521 | Barton, MD | 7.9 mi |
21556 | Pinto, MD | 7.9 mi |
21557 | Rawlings, MD | 8.5 mi |
15564 | Wellersburg, PA | 8.6 mi |
Find every ZIP code within 10 miles of 21543 →
Questions about this ZIP code
Where is ZIP code 21543?
21543 is in Midlothian, Maryland, in Allegany County, part of the Cumberland, MD-WV micropolitan area. Its published point location is 39.6436, -78.9610.
What county is 21543 in?
21543 lies in Allegany County.
What area code is 21543?
Midlothian uses area codes 240 and 301, from NANPA's telephone records.
What time zone is 21543 in?
21543 uses America/New_York.
How many people live in 21543?
About 185 people live in ZIP code 21543, in 122 households, at 75.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 21543?
The closest are 21532 (1.3 mi), 21528 (3.2 mi), 21542 (3.7 mi), 21539 (4.2 mi) and 21545 (7 mi).
Is 21543 a PO Box ZIP code?
21543 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21543 ZIP Code — Midlothian, Maryland (Allegany County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21543
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21543.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.