| Business | Phone |
| Veterans Service Officer 200 E Center St, Madison 57042 | (605) 256-7611 |
| Building Inspector 200 E Center St, Madison 57042 | (605) 256-7623 |
| Building Inspector 219 Ne 1st St, Madison 57042 | (605) 256-7623 |
| Register Of Deeds 200 E Center St, Madison 57042 | (605) 256-7614 |
| Equalization Director Office 200 E Center St, Madison 57042 | (605) 256-7605 |
| Lake County Dispatch 219 Ne 1st St, Madison 57042 | (605) 256-7620 |
| Lake County Extension Svc 1000 S Egan Ave, Madison 57042 | (605) 256-7603 |