Catonsville, Maryland ZIP Codes
- ZIP records
1 - Sum of listed ZIP population estimates
50,492 - Counties represented
1 - Population range
50,492–50,492 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 21228 | Catonsville | Baltimore | 50,492 |
Counties represented
All ZIP Codes in Catonsville
Browse all ZIP data for Maryland
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.