In which county is ZIP code 20659 located?

ZIP 20659 is listed under St. Marys, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 20659: Mechanicsville, MD

ZIP: 20659

County: St. Marys

Coordinates: 38.42930, -76.72540

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 20659 in Mechanicsville, MD. We include verified county details for St. Marys plus key geographic references used for mapping and logistics.

Primary City	Mechanicsville
ZIP Code	20659
County	St. Marys
State	MD
Latitude / Longitude	38.42930, -76.72540
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 20659 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 20659 is approximately 38.42930 (latitude) and -76.72540 (longitude). This location sits within St. Marys, contributing to regional planning across MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20659 for mail delivery and general location reference in St. Marys, MD.

This ZIP may extend beyond the city core into nearby communities within St. Marys.

Related ZIP Codes (Nearby)

Explore other postal codes near Mechanicsville within MD.

Frequently Asked Questions

What is the primary city for ZIP code 20659?

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

In which county is 20659 located?

ZIP code 20659 is situated within St. Marys, MD.

What are the coordinates for 20659?

The approximate center point is 38.42930 (Latitude) and -76.72540 (Longitude).

Is ZIP code 20659 active?

This page lists ZIP 20659 as Listed based on the latest refresh date shown above.

Does ZIP 20659 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