Founded on Jan 19, 1827, Warren County is one of 92 counties in the state of Indiana. Historically, Warren County was formed from Wabash New Purchase and un-organized. The city of Williamsport is the county seat. With FIPS code of 171, Warren County has a population of 8,475 and area of 365 square miles (945 km2).
List of all cities in Warren County, IN alphabetically
| City/Town | Postal Code | Area Code |
| Marshfield, IN | 47993 | 765 |
| Pence, IN | 47993 | 765 |
| Pine Village, IN | 47975 | 765 |
| State Line, IN | 47982 | 765 |
| West Lebanon, IN | 47991 | 765 |
| Williamsport, IN | 47993 | 765 |