In which county is ZIP code 21648 located?

ZIP 21648 is listed under Dorchester, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21648: Madison, MD

ZIP: 21648

County: Dorchester

Coordinates: 38.47820, -76.24120

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 21648, serving Madison in MD. It lies in Dorchester and supports delivery, planning, and address verification.

Primary City	Madison
ZIP Code	21648
County	Dorchester
State	MD
Latitude / Longitude	38.47820, -76.24120
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 21648 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 21648 is approximately 38.47820 (latitude) and -76.24120 (longitude). This location sits within Dorchester, contributing to regional planning across MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21648 for mail delivery and general location reference in Dorchester, MD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Madison within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21648?

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

In which county is 21648 located?

ZIP code 21648 is situated within Dorchester, MD.

What are the coordinates for 21648?

The approximate center point is 38.47820 (Latitude) and -76.24120 (Longitude).

Is ZIP code 21648 active?

This page lists ZIP 21648 as Listed based on the latest refresh date shown above.

Does ZIP 21648 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