Waterloo, Iowa ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
69,066 - Counties represented
1 - Population range
17,952–30,232 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 | 50701 | Waterloo | Black Hawk | 30,232 |
| 2 | 50702 | Waterloo | Black Hawk | 20,882 |
| 3 | 50703 | Waterloo | Black Hawk | 17,952 |
Counties represented
All ZIP Codes in Waterloo
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.