Founded on Jan 29, 1830, St. Joseph County is one of 92 counties in the state of Indiana. Historically, St. Joseph County was formed from un-organized. The city of South Bend is the county seat. With FIPS code of 141, St. Joseph County has a population of 272,212 and area of 458 square miles (1,186 km2).
List of all cities in Saint Joseph County, IN alphabetically
| City/Town | Postal Code | Area Code |
| BRM South Bend, IN | 46699 | 574 |
| Granger, IN | 46530 | 574 |
| Hudson Lake, IN | 46552 | 574 |
| Lakeville, IN | 46536 | 574 |
| Lydick, IN | 46628 | 574 |
| Mishawaka, IN | 46544 | 574 |
| 46545 | 574 | |
| 46546 | 574 | |
| New Carlisle, IN | 46552 | 574 |
| North Liberty, IN | 46554 | 574 |
| Notre Dame, IN | 46556 | 574 |
| Osceola, IN | 46561 | 574 |
| Saint Marys, IN | 46556 | 574 |
| South Bend, IN | 46601 | 574 |
| 46613 | 574 | |
| 46614 | 574 | |
| 46615 | 574 | |
| 46616 | 574 | |
| 46617 | 574 | |
| 46619 | 574 | |
| 46624 | 574 | |
| 46626 | 574 | |
| 46628 | 574 | |
| 46634 | 574 | |
| 46635 | 574 | |
| 46637 | 574 | |
| 46660 | 574 | |
| 46680 | 574 | |
| 46699 | 574 | |
| South Bend Tribune, IN | 46626 | 574 |
| Walkerton, IN | 46574 | 574 |
| Wyatt, IN | 46595 | 574 |