Founded on Jan 15, 1851, Harrison County is one of 99 counties in the state of Iowa. Historically, Harrison County was formed from Pottawattamie County. The city of Logan is the county seat. With FIPS code of 85, Harrison County has a population of 14,669 and area of 697 square miles (1,805 km2).
List of all cities in Harrison County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Dunlap, IA | 51529 | 712 |
| Little Sioux, IA | 51545 | 712 |
| Logan, IA | 51546 | 712 |
| Logan, IA | 51550 | 712 |
| Magnolia, IA | 51550 | 712 |
| Missouri Valley, IA | 51555 | 712 |
| Mo Valley, IA | 51555 | 712 |
| Modale, IA | 51556 | 712 |
| Mondamin, IA | 51557 | 712 |
| Persia, IA | 51563 | 712 |
| Pisgah, IA | 51564 | 712 |
| Woodbine, IA | 51579 | 712 |