| Business | Phone |
| Hillsdale County Ind Dev 279 Industrial Dr, Hillsdale 49242 | (517) 437-3200 |
| Hillsdale Drop-In Ctr 49 W Carleton Rd, Hillsdale 49242 | (517) 439-9730 |
| Key Opportunities Inc 400 Hillsdale St, Hillsdale 49242 | (517) 437-4469 |
| Potential Development Homes 14 W Carleton Rd, Hillsdale 49242 | (517) 439-1471 |