Randallstown, MD ZIP Codes
Randallstown, Maryland has 3 ZIP codes: 3 for street addresses (, and ).
Your street decides which one you use.
Which Randallstown ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Randallstown ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: the Randallstown Census outline.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Randallstown ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 21133 | street delivery Randallstown |
| 21163 | street delivery; mail may be addressed to Woodstock Randallstown |
| 21208 | street delivery; mail may be addressed to Pikesville Pikesville Carrier Annex |
ZIP codes from nearby towns that reach into Randallstown
- 21244, mailing town Windsor Mill, covers 7 percent of Randallstown
Why your mail may say Randallstown when you live outside it
Randallstown ZIP codes also cover Pikesville, Lochearn and Garrison, so a letter addressed to Randallstown can go to a home outside the town.
The reverse happens too: parts of Randallstown use 21244, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Baltimore County property records show which city you are in.
Randallstown ZIP code questions
What is the main ZIP code for Randallstown?
21133, the ZIP code of the main Randallstown post office at 3608 Offutt Rd.
What county is Randallstown in?
Baltimore County.
ZIP codes for towns near Randallstown
More towns near Randallstown: Eldersburg, Towson, Baltimore, Columbia, Parkville, Severn, Dundalk, Glen Burnie, Essex.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections