ZIP Code 20678: Prince Frederick, MD
County: Calvert
Coordinates: 38.53360, -76.59550
ZIP Type: Standard
Time Zone: Eastern Time (ET)
This profile provides an in-depth look at ZIP code 20678, serving Prince Frederick in MD. It lies in Calvert and supports delivery, planning, and address verification.
| Primary City | Prince Frederick |
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| ZIP Code | 20678 |
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| County | Calvert |
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| State | MD |
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| Latitude / Longitude | 38.53360, -76.59550 |
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| ZIP Type | Standard |
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| Time Zone | Eastern Time (ET) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 20678 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 20678 is approximately 38.53360 (latitude) and -76.59550 (longitude). This location sits within Calvert, contributing to regional planning across MD.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20678 for mail delivery and general location reference in
Calvert,
MD.
Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Prince Frederick.
Related ZIP Codes (Nearby)
Explore other postal codes near Prince Frederick within MD.
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Frequently Asked Questions
What is the primary city for ZIP code 20678?
The primary city for this ZIP code is Prince Frederick, located in MD.
In which county is 20678 located?
ZIP code 20678 is situated within Calvert, MD.
What are the coordinates for 20678?
The approximate center point is 38.53360 (Latitude) and -76.59550 (Longitude).
Is ZIP code 20678 active?
This page lists ZIP 20678 as Listed based on the latest refresh date shown above.
Does ZIP 20678 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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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