Zip codes for Howard County-Maryland
Howard County-MarylandHoward County-MarylandHoward County-MarylandHoward County-Maryland
| 20701 Annapolis Jct | 410/443/667 | Howard County | Maryland (MD) |
| 20701 Annapolis Junction | 410/443/667 | Howard County | Maryland (MD) |
| 20588 Cheltenham | 202 | Howard County | Maryland (MD) |
| 21029 Clarksville | 410/443/667 | Howard County | Maryland (MD) |
| 20588 Columbia | 202 | Howard County | Maryland (MD) |
| 21044 Columbia | 410/443/667 | Howard County | Maryland (MD) |
| 21045 Columbia | 410/443/667 | Howard County | Maryland (MD) |
| 21046 Columbia | 410/443/667 | Howard County | Maryland (MD) |
| 21723 Cooksville | 410/443/667 | Howard County | Maryland (MD) |
| 21043 Daniels | 410/443/667 | Howard County | Maryland (MD) |
| 21036 Dayton | 410/443/667 | Howard County | Maryland (MD) |
| 20588 Dept HS | 202 | Howard County | Maryland (MD) |
| 20588 DHS | 202 | Howard County | Maryland (MD) |
| 21075 Elkridge | 410/443/667 | Howard County | Maryland (MD) |
| 21041 Ellicott | 410/443/667 | Howard County | Maryland (MD) |
| 21042 Ellicott | 410/443/667 | Howard County | Maryland (MD) |
| 21043 Ellicott | 410/443/667 | Howard County | Maryland (MD) |
| 21041 Ellicott City | 410/443/667 | Howard County | Maryland (MD) |
| 21042 Ellicott City | 410/443/667 | Howard County | Maryland (MD) |
| 21043 Ellicott City | 410/443/667 | Howard County | Maryland (MD) |
| 20759 Fulton | 410/443/667 | Howard County | Maryland (MD) |
| 21737 Glenelg | 410/443/667 | Howard County | Maryland (MD) |
| 21738 Glenwood | 410/443/667 | Howard County | Maryland (MD) |
| 21163 Granite | 410/443/667 | Howard County | Maryland (MD) |
| 21075 Hanover | 410/443/667 | Howard County | Maryland (MD) |
| 21163 Henryton | 410/443/667 | Howard County | Maryland (MD) |
| 20777 Highland | 301/240/227 | Howard County | Maryland (MD) |
| 21043 Ilchester | 410/443/667 | Howard County | Maryland (MD) |
| 20794 Jessup | 410/443/667 | Howard County | Maryland (MD) |
| 20723 Laurel | 301/240/227 | Howard County | Maryland (MD) |
| 21765 Lisbon | 410/443/667 | Howard County | Maryland (MD) |
| 21043 Oella | 410/443/667 | Howard County | Maryland (MD) |
| 20763 Savage | 410/443/667 | Howard County | Maryland (MD) |
| 20723 Scaggsville | 301/240/227 | Howard County | Maryland (MD) |
| 21150 Simpsonville | 410/443/667 | Howard County | Maryland (MD) |
| 21794 West Friendship | 410/443/667 | Howard County | Maryland (MD) |
| 21797 Woodbine | 410/443/667 | Howard County | Maryland (MD) |
| 21163 Woodstock | 410/443/667 | Howard County | Maryland (MD) |
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