In which county is ZIP code 21918 located?

ZIP 21918 is listed under Cecil, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21918: Conowingo, MD

ZIP: 21918

County: Cecil

Coordinates: 39.67780, -76.15720

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Conowingo, MD postal area 21918. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Conowingo
ZIP Code	21918
County	Cecil
State	MD
Latitude / Longitude	39.67780, -76.15720
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 21918 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 21918 is commonly represented around 39.67780, -76.15720. These coordinates help identify the general area within Cecil, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21918 for mail delivery and general location reference in Cecil, MD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Conowingo within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21918?

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

In which county is 21918 located?

ZIP code 21918 is situated within Cecil, MD.

What are the coordinates for 21918?

The approximate center point is 39.67780 (Latitude) and -76.15720 (Longitude).

Is ZIP code 21918 active?

This page lists ZIP 21918 as Listed based on the latest refresh date shown above.

Does ZIP 21918 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