Founded on Feb 7, 1835, Marshall County is one of 92 counties in the state of Indiana. Historically, Marshall County was formed from St. Joseph County. The city of Plymouth is the county seat. With FIPS code of 99, Marshall County has a population of 46,121 and area of 444 square miles (1,150 km2).
List of all cities in Marshall County, IN alphabetically
| City/Town | Postal Code | Area Code |
| Argos, IN | 46501 | 574 |
| Bourbon, IN | 46504 | 574 |
| Bremen, IN | 46506 | 574 |
| Burr Oak, IN | 46511 | 574 |
| Clvr Mil Acadamy, IN | 46511 | 574 |
| Culver, IN | 46511 | 574 |
| Donaldson, IN | 46513 | 574 |
| Inwood, IN | 46563 | 574 |
| Lapaz, IN | 46537 | 574 |
| Plymouth, IN | 46563 | 574 |
| Tippecanoe, IN | 46570 | 574 |
| Tyner, IN | 46572 | 574 |