Founded on Jan 13, 1846, Clarke County is one of 99 counties in the state of Iowa. Historically, Clarke County was formed from Lucas County. The city of Osceola is the county seat. With FIPS code of 39, Clarke County has a population of 9,785 and area of 431 square miles (1,116 km2).
List of all cities in Clarke County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Hopeville, IA | 50174 | 641 |
| Murray, IA | 50174 | 641 |
| Osceola, IA | 50213 | 641 |
| Woodburn, IA | 50275 | 641 |