Howard County, Maryland ZIP codes
24 ZIP codes are in Howard County, plus 5 that cross in from neighboring counties. It's part of the Baltimore-Columbia-Towson, MD metro area.
- ZIP codes
- 24
- Population in these ZIPs
- 335,512
- Avg. median income
- $154,200population-weighted
- Cities & towns
- 20
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Howard County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 20588 PO Box | Dhs | — | — | — |
| 20701 | Annapolis Junction | 513 | $85,594 | — |
| 20723 | Laurel | 36,866 | $138,113 | $578,100 |
| 20759 | Fulton | 6,624 | $250,001 | $994,200 |
| 20763 | Savage | 2,601 | $76,842 | $485,100 |
| 20777 | Highland | 3,221 | $226,146 | $984,700 |
| 20794 | Jessup | 16,814 | $116,406 | $486,400 |
| 21029 | Clarksville | 13,607 | $243,542 | $1,046,000 |
| 21036 | Dayton | 2,569 | $218,036 | $1,008,300 |
| 21041 PO Box | Ellicott City | — | — | — |
| 21042 | Ellicott City | 43,327 | $190,061 | $797,000 |
| 21043 | Ellicott City | 48,525 | $148,125 | $626,700 |
| 21044 | Columbia | 44,114 | $135,057 | $537,100 |
| 21045 | Columbia | 40,034 | $118,563 | $476,400 |
| 21046 | Columbia | 15,608 | $127,813 | $514,800 |
| 21075 | Elkridge | 37,363 | $135,303 | $482,000 |
| 21104 | Marriottsville | 6,052 | $191,804 | $716,400 |
| 21150 PO Box | Simpsonville | — | — | — |
| 21723 | Cooksville | 669 | $241,250 | $910,200 |
| 21737 | Glenelg | 2,474 | $250,001 | $1,193,100 |
| 21738 | Glenwood | 3,696 | $250,001 | $977,400 |
| 21765 PO Box | Lisbon | — | — | — |
| 21794 | West Friendship | 2,192 | $231,466 | $1,028,300 |
| 21797 | Woodbine | 8,643 | $189,241 | $800,300 |
ZIP codes partly in Howard County
These ZIP codes are mostly in a neighboring county but cover part of Howard County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 20833 | Brookeville | Montgomery County | 7,860 | $204,375 | $801,800 |
| 21076 | Hanover | Anne Arundel County | 24,268 | $146,869 | $531,300 |
| 21163 | Woodstock | Baltimore County | 7,539 | $134,672 | $649,000 |
| 21771 | Mount Airy | Frederick County | 33,031 | $157,302 | $625,900 |
| 21784 | Sykesville | Carroll County | 39,258 | $139,395 | $553,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Howard County
Nearby counties
Frequently asked questions
How many ZIP codes are in Howard County, Maryland?
24 ZIP codes are mainly in Howard County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Howard County?
ZIP codes in Howard County use the city names Annapolis Junction, Clarksville, Columbia, Cooksville, Dayton, Dhs, Elkridge, Ellicott City, Fulton, Glenelg, Glenwood and Highland and others.
What metro area is Howard County in?
Howard County is part of the Baltimore-Columbia-Towson, MD metropolitan statistical area.