Preston, MD zip code
Preston, Maryland uses one zip code: 21655. Most of it is in Caroline County. Together these zip codes are home to about 5.1K people.
Zip codes
1
Population
5.1K
All zips combined
Largest zip
21655
5,053 residents
Zip codes in Preston
| Zip | Type | Population | IncomeMedian income |
|---|---|---|---|
| 21655 | 5,053 | $90,385 |