ZIP Code 21045
Columbia, Maryland
ZIP Code Information
ZIP code 21045 is the delivery code the USPS assigns to Columbia, Maryland. The ZIP lies within Howard County. Clocks here follow the America/New_York time zone (UTC-4).
About 39,426 people live in this ZIP code, and the median household income is roughly $98,117 a year. Figures come from the U.S. Census Bureau American Community Survey and are refreshed as new five-year estimates are released.
What you can do with ZIP code 21045
- Write a mailing address: Columbia, MD 21045. The ZIP goes last, after the state abbreviation.
- Check whether a shipping or delivery quote applies to this area — most US carriers price by ZIP code rather than by city.
- Look up the local time zone before scheduling a call — the ZIP tells you which zone applies to that address.
- Compare the ZIP with neighbouring codes to see how population and income shift block by block.
Location Map
Full mapNearby ZIP Codes
Radius search| ZIP Code | City | Distance | |
|---|---|---|---|
| 21044 | Columbia | 4.1 km | Distance |
| 21046 | Columbia | 4.3 km | Distance |
| 21043 | Ellicott City | 6.2 km | Distance |
| 21075 | Elkridge | 6.8 km | Distance |
| 20794 | Jessup | 7.2 km | Distance |
| 20763 | Savage | 7.5 km | Distance |
| 21042 | Ellicott City | 7.9 km | Distance |
| 20701 | Annapolis Junction | 8.5 km | Distance |
| 20723 | Laurel | 9.4 km | Distance |
| 21041 | Ellicott City | 10.1 km | Distance |
Nearby Cities
Ellicott City, Maryland
(6.2 km)
Elkridge, Maryland
(6.8 km)
Jessup, Maryland
(7.2 km)
Savage, Maryland
(7.5 km)
Annapolis Junction, Maryland
(8.5 km)
Laurel, Maryland
(9.4 km)
Frequently Asked Questions
ZIP code 21045 is located in Columbia, Maryland.
ZIP code 21045 is in Howard county, Maryland.
ZIP code 21045 is in the America/New_York timezone.