| Business | Phone |
| Cottrellville Twp Office 7008 Marsh Rd, Marine City 48039 | (810) 765-7103 |
| Cottrellville Twp Office 1114 Roberts Rd, Marine City 48039 | (810) 765-7926 |
| Cottrellville Twp Office 6748 River Rd, Marine City 48039 | (810) 765-4648 |
| Cottrellville Twp Office 7070 River Rd, Marine City 48039 | (810) 765-7142 |