13 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52001 | Dubuque | 43,101 |
| 52002 | Dubuque | 17,005 |
| 52003 | Dubuque | 13,796 |
| 52068 | Peosta | 5,280 |
| 52046 | Farley | 3,129 |
| 52045 | Epworth | 2,777 |
| 52073 | Sherrill | 1,381 |
| 52032 | Bernard | 1,305 |
| 52053 | Holy Cross | 1,148 |
| 52039 | Durango | 1,079 |
| 52078 | Worthington | 870 |
| 52065 | New Vienna | 671 |
| 52056 | Luxemburg | 229 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in Dubuque County, Iowa (US Census).