In which county is ZIP code 21543 located?

ZIP 21543 is listed under Allegany, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21543: Midlothian, MD

ZIP: 21543

County: Allegany

Coordinates: 39.63390, -78.96040

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 21543 in Midlothian, MD. We include verified county details for Allegany plus key geographic references used for mapping and logistics.

Primary City	Midlothian
ZIP Code	21543
County	Allegany
State	MD
Latitude / Longitude	39.63390, -78.96040
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 21543 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 21543 are listed as 39.63390 / -78.96040, useful for GPS and service checks in and around Midlothian, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21543 for mail delivery and general location reference in Allegany, MD.

Some addresses near Midlothian may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Midlothian within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21543?

The primary city for this ZIP code is Midlothian, located in MD.

In which county is 21543 located?

ZIP code 21543 is situated within Allegany, MD.

What are the coordinates for 21543?

The approximate center point is 39.63390 (Latitude) and -78.96040 (Longitude).

Is ZIP code 21543 active?

This page lists ZIP 21543 as Listed based on the latest refresh date shown above.

Does ZIP 21543 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08