In which county is ZIP code 21133 located?

ZIP 21133 is listed under Baltimore County, MD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 21133: Randallstown, MD

ZIP: 21133

County: Baltimore County

Coordinates: 39.37460, -76.80020

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 21133 in Randallstown, MD. We include verified county details for Baltimore County plus key geographic references used for mapping and logistics.

Primary City	Randallstown
ZIP Code	21133
County	Baltimore County
State	MD
Latitude / Longitude	39.37460, -76.80020
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 21133 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 21133 are listed as 39.37460 / -76.80020, useful for GPS and service checks in and around Randallstown, MD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 21133 for mail delivery and general location reference in Baltimore County, MD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Randallstown within MD.

Frequently Asked Questions

What is the primary city for ZIP code 21133?

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

In which county is 21133 located?

ZIP code 21133 is situated within Baltimore County, MD.

What are the coordinates for 21133?

The approximate center point is 39.37460 (Latitude) and -76.80020 (Longitude).

Is ZIP code 21133 active?

This page lists ZIP 21133 as Listed based on the latest refresh date shown above.

Does ZIP 21133 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