21723 ZIP Code: Living in Cooksville, MD
Updated November 2026 · Data: U.S. Census Bureau, American Community Survey 2020–2024
ZIP code 21723 is in Howard County, Maryland, and covers Cooksville. A small rural crossroads in western Howard County near I-70 and MD-97. About 669 people live in the 21723 ZIP code area.
21723 at a glance
Figures are Census estimates for ZIP Code Tabulation Area 21723, which closely follows the postal ZIP code. This area has few residents, so housing estimates are not shown because they would be unreliable.
What’s your 21723 home worth?
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Neighborhoods and communities in 21723
The 21723 ZIP code includes Cooksville. ZIP code lines don’t always match neighborhood or school boundaries, so confirm the details for any specific address.
Commuting from 21723
Here is how far the center of the 21723 ZIP code is from major job centers and travel hubs. These are straight-line distances; drive times depend on route and traffic.
| Destination | Distance |
|---|---|
| Downtown Baltimore | 21 miles |
| Washington, D.C. | 30 miles |
| BWI Airport | 21 miles |
| Annapolis | 37 miles |
| Fort Meade | 21 miles |
| Columbia Town Center | 11 miles |
| Towson | 22 miles |
Living in Howard County: what to know
Howard County has no incorporated cities; Columbia and Ellicott City are unincorporated communities governed by the county. Homes in the western part of the county often use well and septic rather than public water and sewer, so check that before you buy.
Public schools in 21723 are run by Howard County Public School System. Assignments go by street address, not ZIP code, so use the district’s school locator for a specific home. To compare schools, see the Maryland State Department of Education Report Card.
For taxes, commuting and lifestyle across the county, read our Howard County relocation guide. For parks and trails, see Howard County parks.
ZIP codes near 21723
- 21794 – West Friendship
- 21797 – Woodbine
- 21738 – Glenwood
- 21104 – Marriottsville
- 21737 – Glenelg
- 21036 – Dayton
Looking at homes in 21723?
See every home for sale in this ZIP code, updated throughout the day, or ask a local agent about the neighborhoods here.
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21723 ZIP code: frequently asked questions
What county is ZIP code 21723 in?
ZIP code 21723 is in Howard County, Maryland.
What neighborhoods are in the 21723 ZIP code?
The 21723 ZIP code includes Cooksville.
How far is 21723 from Baltimore and Washington, D.C.?
The center of the 21723 ZIP code is about 21 miles from downtown Baltimore and 30 miles from Washington, D.C., in a straight line. Drive times vary with traffic.
Where can I see homes for sale in 21723?
You can see all current homes for sale in 21723 on GreatestMoves.com, our home search site, at https://www.greatestmoves.com/zip-codes/21723/.
Sources: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024 (tables DP03, DP04, DP05) for ZCTA 21723; U.S. Census Bureau TIGERweb ZCTA boundaries. Distances are calculated from the ZCTA’s internal point.