Founded on Feb 24, 1847, Fremont County is one of 99 counties in the state of Iowa. Historically, Fremont County was formed from Pottawattamie County. The city of Sidney is the county seat. With FIPS code of 71, Fremont County has a population of 6,567 and area of 511 square miles (1,323 km2).
List of all cities in Fremont County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Bartlett, IA | 51654 | 712 |
| Farragut, IA | 51639 | 712 |
| Hamburg, IA | 51640 | 712 |
| Imogene, IA | 51645 | 712 |
| Percival, IA | 51648 | 712 |
| Randolph, IA | 51649 | 712 |
| Riverton, IA | 51650 | 712 |
| Sidney, IA | 51652 | 712 |
| Tabor, IA | 51653 | 712 |
| Thurman, IA | 51654 | 712 |