In which county is ZIP code 21005 located?

ZIP 21005 is listed under Harford, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21005: Aberdeen Proving Ground, MD

ZIP: 21005

County: Harford

Coordinates: 39.47710, -76.12080

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Aberdeen Proving Ground, MD postal area 21005. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Aberdeen Proving Ground
ZIP Code	21005
County	Harford
State	MD
Latitude / Longitude	39.47710, -76.12080
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 21005 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 21005 is commonly represented around 39.47710, -76.12080. These coordinates help identify the general area within Harford, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21005 for mail delivery and general location reference in Harford, MD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Aberdeen Proving Ground within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21005?

The primary city for this ZIP code is Aberdeen Proving Ground, located in MD.

In which county is 21005 located?

ZIP code 21005 is situated within Harford, MD.

What are the coordinates for 21005?

The approximate center point is 39.47710 (Latitude) and -76.12080 (Longitude).

Is ZIP code 21005 active?

This page lists ZIP 21005 as Listed based on the latest refresh date shown above.

Does ZIP 21005 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