Columbia, Maryland ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
99,756 - Counties represented
1 - Population range
15,608–44,114 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 | 21044 | Columbia | Howard | 44,114 |
| 2 | 21045 | Columbia | Howard | 40,034 |
| 3 | 21046 | Columbia | Howard | 15,608 |
Counties represented
All ZIP Codes in Columbia
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.