| Business | Phone |
| Calhoun County Law Enforcement 212 S Grand St, Marshall 49068 | (269) 781-0942 |
| Calhoun County Police Dept Marshall 49068 | (269) 781-9801 |
| Calhoun County Sheriff 212 S Grand St, Marshall 49068 | (269) 781-0939 |
| Calhoun County Sheriff Office 212 S Grand St, Marshall 49068 | (269) 781-0880 |