Founded on Dec 31, 1823, Johnson County is one of 92 counties in the state of Indiana. Historically, Johnson County was formed from Delaware New Purchase. The city of Franklin is the county seat. With FIPS code of 81, Johnson County has a population of 164,298 and area of 320 square miles (829 km2).
List of all cities in Johnson County, IN alphabetically
| City/Town | Postal Code | Area Code |
| Amity, IN | 46131 | 317 |
| Atterbury, IN | 46124 | 812 |
| Bargersville, IN | 46106 | 317 |
| Bengal, IN | 46131 | 317 |
| Camp Atterbury, IN | 46124 | 812 |
| Edinburgh, IN | 46124 | 812 |
| Franklin, IN | 46131 | 317 |
| Greenwood, IN | 46142 | 317 |
| 46143 | 317 | |
| Grnwood, IN | 46143 | 317 |
| Hopewell, IN | 46131 | 317 |
| Needham, IN | 46162 | 317 |
| New Whiteland, IN | 46184 | 317 |
| Nineveh, IN | 46164 | 317 |
| Peoga, IN | 46181 | 317 |
| Providence, IN | 46106 | 317 |
| Samaria, IN | 46181 | 317 |
| Spearsville, IN | 46181 | 317 |
| Trafalgar, IN | 46181 | 317 |
| Urmeyville, IN | 46131 | 317 |
| Whiteland, IN | 46184 | 317 |