| Business | Phone |
| Algonac City Hall 805 Saint Clair River Dr, Algonac 48001 | (810) 794-9361 |
| Algonac City Office 1765 Washington St, Algonac 48001 | (810) 794-9150 |
| Algonac Housing Commission 1205 Saint Clair River Dr, Algonac 48001 | (810) 794-9369 |
| Building & Grounds Supervisor 5200 Taft Rd, Algonac 48001 | (810) 794-5001 |
| Clay Township Building Dept 4710 Pointe Tremble Rd, Algonac 48001 | (810) 794-9320 |
| Clay Township Clerk 4710 Pointe Tremble Rd, Algonac 48001 | (810) 794-9303 |