Founded on Sep 6, 1834, Dubuque County is one of 99 counties in the state of Iowa. Historically, Dubuque County was formed from Michigan Territory and Wisconsin Territory. The city of Dubuque is the county seat. With FIPS code of 61, Dubuque County has a population of 98,718 and area of 608 square miles (1,575 km2).
List of all cities in Dubuque County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Asbury, IA | 52002 | 563 |
| Bankston, IA | 52045 | 563 |
| Bernard, IA | 52032 | 563 |
| Cascade, IA | 52033 | 563 |
| Center Grove, IA | 52001 | 563 |
| Centralia, IA | 52068 | 563 |
| Dubuque, IA | 52001 | 563 |
| 52002 | 563 | |
| 52003 | 563 | |
| 52004 | 563 | |
| 52099 | 563 | |
| 52039 | 563 | |
| Dyersville, IA | 52040 | 563 |
| Eagle Point, IA | 52001 | 563 |
| Epworth, IA | 52045 | 563 |
| Farley, IA | 52046 | 563 |
| Fillmore, IA | 52033 | 563 |
| Holy Cross, IA | 52053 | 563 |
| Julien, IA | 52001 | 563 |
| Key West, IA | 52001 | 563 |
| Luxemburg, IA | 52056 | 563 |
| Massey, IA | 52001 | 563 |
| McGraw Hill Companies, IA | 52099 | 563 |
| New Vienna, IA | 52065 | 563 |
| Otter Creek, IA | 52079 | 563 |
| Peosta, IA | 52068 | 563 |
| Petersburg, IA | 52040 | 563 |
| Rockdale, IA | 52001 | 563 |
| Sageville, IA | 52001 | 563 |
| Shawondasse, IA | 52001 | 563 |
| Sherrill, IA | 52073 | 563 |
| Worthington, IA | 52078 | 563 |
| Zwingle, IA | 52079 | 563 |