In which county is ZIP code 20620 located?

ZIP 20620 is listed under St. Marys, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 20620: Callaway, MD

ZIP: 20620

County: St. Marys

Coordinates: 38.22750, -76.52100

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 20620, serving Callaway in MD. It lies in St. Marys and supports delivery, planning, and address verification.

Primary City	Callaway
ZIP Code	20620
County	St. Marys
State	MD
Latitude / Longitude	38.22750, -76.52100
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 20620 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 20620 is commonly represented around 38.22750, -76.52100. These coordinates help identify the general area within St. Marys, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20620 for mail delivery and general location reference in St. Marys, MD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Callaway within MD.

Frequently Asked Questions

What is the primary city for ZIP code 20620?

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

In which county is 20620 located?

ZIP code 20620 is situated within St. Marys, MD.

What are the coordinates for 20620?

The approximate center point is 38.22750 (Latitude) and -76.52100 (Longitude).

Is ZIP code 20620 active?

This page lists ZIP 20620 as Listed based on the latest refresh date shown above.

Does ZIP 20620 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