Complete ZIP Code Details
| ZIP Code | 46778 |
| City | Petroleum |
| State | Indiana (IN) |
| County | Wells |
| Timezone | America/Indiana/Indianapolis |
| Coordinates | 40.6105500, -85.1549100 |
| Population | 34 |
| ZIP Type | STANDARD |
| Country | United States |
| ZIP Code | 46778 |
| City | Petroleum |
| State | Indiana (IN) |
| County | Wells |
| Timezone | America/Indiana/Indianapolis |
| Coordinates | 40.6105500, -85.1549100 |
| Population | 34 |
| ZIP Type | STANDARD |
| Country | United States |