Carroll County, Maryland ZIP Codes
- ZIP records
9 - Cities represented
8 - Sum of listed ZIP population estimates
158,322
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 21784 | Sykesville | 39,258 |
| 2 | 21157 | Westminster | 38,984 |
| 3 | 21158 | Westminster | 22,083 |
| 4 | 21074 | Hampstead | 14,777 |
| 5 | 21102 | Manchester | 12,162 |
| 6 | 21787 | Taneytown | 11,645 |
| 7 | 21048 | Finksburg | 10,481 |
| 8 | 21776 | New Windsor | 6,261 |
| 9 | 21757 | Keymar | 2,671 |
Cities in Carroll County
ZIP Directory
Browse all ZIP data for Maryland
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.