| Business | Phone |
| Casco Township Office 7104 107th Ave, South Haven 49090 | (269) 637-4441 |
| South Haven Building Inspector 539 Phoenix St, South Haven 49090 | (269) 637-0789 |
| South Haven Cemetery Dept South Haven 49090 | (269) 637-0725 |
| South Haven City Leisure Svc South Haven 49090 | (269) 637-0771 |
| South Haven City Office 539 Phoenix St, South Haven 49090 | (269) 637-0700 |
| South Haven Code Enforcement 539 Phoenix St, South Haven 49090 | (269) 637-0763 |
| South Haven Electric Dept 1199 8th Ave, South Haven 49090 | (269) 637-0778 |
| South Haven Harbor Master 539 Phoenix St, South Haven 49090 | (269) 637-0771 |
| South Haven Manager 539 Phoenix St, South Haven 49090 | (269) 637-0750 |
| South Haven Township Hall 9761 Blue Star Memorial Hwy, South Haven 49090 | (269) 637-3305 |
| South Haven Wastewater Plant 539 Phoenix St, South Haven 49090 | (269) 637-0716 |
| South Haven Water Filtration 60 Water St, South Haven 49090 | (269) 637-0715 |