| Business | Phone |
| Onsted Board Of Education 102 W 2nd St, Onsted 49265 | (517) 467-2174 |
| Onsted Community Schools 10109 Slee Rd 10, Onsted 49265 | (517) 467-2171 |
| Onsted Intermediate School 10109 Slee Rd, Onsted 49265 | (517) 467-7046 |
| Onsted Primary Building K-2 10109 Slee Rd, Onsted 49265 | (517) 467-2166 |