Ellicott City, MD ZIP Codes
Ellicott City, Maryland has 3 ZIP codes: 2 for street addresses ( and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Ellicott City 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?
Ellicott City ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
21041 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: the Ellicott City Census outline.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Ellicott City ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 21041 | PO boxes at the Ellicott City post office Ellicott City |
| 21042 | street delivery Ellicott City |
| 21043 | street delivery Ellicott City |
ZIP codes from nearby towns that reach into Ellicott City
- 21163, mailing town Woodstock, covers 4 percent of Ellicott City
Why your mail may say Ellicott City when you live outside it
Ellicott City ZIP codes also cover Ilchester, so a letter addressed to Ellicott City can go to a home outside the town.
The reverse happens too: parts of Ellicott City use 21163, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Howard County property records show which city you are in.
Ellicott City ZIP code questions
What is the main ZIP code for Ellicott City?
21042, the ZIP code of the main Ellicott City post office at 3375 Ellicott Center Dr.
Which Ellicott City ZIP codes are for PO boxes only?
21041. Mail to it goes to boxes at the post office, not to street addresses.
What county is Ellicott City in?
Howard County.
ZIP codes for towns near Ellicott City
More towns near Ellicott City: Pikesville, Eldersburg, Baltimore, Severn, Towson, Glen Burnie, Olney, Odenton, Parkville.
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