| Business | Phone |
| Oscoda County Commissioners 311 Morenci St, Mio 48647 | (989) 826-1130 |
| Oscoda County Community Ctr 305 E 9th St, Mio 48647 | (989) 826-9919 |
| Oscoda County Equalization 311 Morenci Ave, Mio 48647 | (989) 826-1103 |
| Oscoda County Extension Ofc 101 S Court St, Mio 48647 | (989) 826-1160 |
| Oscoda County Housing Program Courthouse Anx, Mio 48647 | (989) 826-1167 |
| Oscoda County Juvenile Officer Courthouse Anx, Mio 48647 | (989) 826-1115 |
| Oscoda County Maintenance Po Box 399, Mio 48647 | (989) 826-1168 |
| Oscoda County Motor Pool 206 E 8th St, Mio 48647 | (989) 826-1169 |
| Oscoda County Public Grdnshp Po Box 58, Mio 48647 | (989) 826-1170 |
| Oscoda County Register-Deeds 311 Morenci Ave, Mio 48647 | (989) 826-1116 |
| Oscoda County Road Commission 300 W 8th St, Mio 48647 | (989) 826-3218 |