In which county is ZIP code 21711 located?

ZIP 21711 is listed under Washington, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21711: Big Pool, MD

ZIP: 21711

County: Washington

Coordinates: 39.64570, -78.01040

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 21711 in Big Pool, MD. We include verified county details for Washington plus key geographic references used for mapping and logistics.

Primary City	Big Pool
ZIP Code	21711
County	Washington
State	MD
Latitude / Longitude	39.64570, -78.01040
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 21711 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 21711 are listed as 39.64570 / -78.01040, useful for GPS and service checks in and around Big Pool, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21711 for mail delivery and general location reference in Washington, MD.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Big Pool.

Related ZIP Codes (Nearby)

Explore other postal codes near Big Pool within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21711?

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

In which county is 21711 located?

ZIP code 21711 is situated within Washington, MD.

What are the coordinates for 21711?

The approximate center point is 39.64570 (Latitude) and -78.01040 (Longitude).

Is ZIP code 21711 active?

This page lists ZIP 21711 as Listed based on the latest refresh date shown above.

Does ZIP 21711 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