| Business | Phone |
| Island Head Start 755 Main St, Calhoun 42327 | (270) 273-0084 |
| Mc Lean Superintendent Office 283 Main St, Calhoun 42327 | (270) 273-5257 |
| Mc Lean County High School 1959 State Route 136 E, Calhoun 42327 | (270) 273-5278 |
| Mc Lean County Middle School 1901 State Route 136 E, Calhoun 42327 | (270) 273-5191 |
| Calhoun School 755 Main St, Calhoun 42327 | (270) 273-3264 |