| Business | Phone |
| Hartford Adult Education 84085 County Road 687, Hartford 49057 | (269) 621-2463 |
| Hartford High School 115a School St, Hartford 49057 | (269) 621-7100 |
| Hartford Middle School 141 School St, Hartford 49057 | (269) 621-7200 |
| Hartford Public School Dist 115 School St B, Hartford 49057 | (269) 621-2441 |
| Hartford Public Schools Adm 115 School St B, Hartford 49057 | (269) 621-7000 |
| Woodside Elementary School 395 Woodside Dr, Hartford 49057 | (269) 621-7300 |
| Telamon Corp Keeler Headstart 89210 County Road 687, Hartford 49057 | (269) 424-3521 |
| Red Arrow Elementary Hartford 49057 | (269) 621-7400 |
| Red Arrow Elementary 15 S East St, Hartford 49057 | (269) 621-6458 |