| Service/Topic | Department/Agency | Phone |
| School Health Services | Public Health Department | (810) 257-3591 |
| Secret Marriages | Clerks | (810) 257-3225 |
| Senior Food Service | GCCARD | (810) 235-5267 |
| Sexually Transmitted Disease Testing and Treatment | Public Health Department | (810) 257-3435 |
| Shelter Inspection & Regulation | Public Health Department | (810) 257-3603 |
| Small Claims/Civil Actions (<$25,000) | 67th District Court | (810) 257-3170 |
| Soldiers Relief Commission | Veterans Information Center | (810) 257-3068 |
| Solid Waste Planning | Planning Commission | (810) 257-3010 |
| STD/HIV Partner Notification and Counseling | Public Health Department | (810) 257-3435 |
| Stray Animals | Animal Control | (810) 732-1660 |
| Substance Abuse Treatment | GCCMH | (810) 257-3705 |
| Support/Account Information | Friend of the Court | (810) 257-0781 |
| Tax Assessments | Equalization | (810) 257-3074 |
| Tax Liens | Register of Deeds | (810) 257-3060 |
| Tax Parcel Numbers | Equalization | (810) 257-3074 |
| Telephone Carriers | Purchasing | (810) 257-3030 |
| Tickets | 67th District Court | (810) 257-3170 |
| Tobacco Reduction/Enforcement | Public Health Department | (810) 257-3603 |
| Tornado | Emergency Management | (810) 257-3064 |
| Traffic Accidents | Sheriff | (810) 257-3418 |
| Traffic Division | Sheriff | (810) 257-3420 |
| Transcript Request | Circuit Court & Probate Court | (810) 424-4454 |
| Transportation | Planning Commission | (810) 257-3010 |
| Trucking Information | Road Commission | (810) 767-4920 |
| Tuberculosis Control Program | Public Health Department | (810) 257-1017 |
| UCC's (Uniform Commercial Code) | Register of Deeds | (810) 257-3060 |
| Vendor List | Purchasing | (810) 257-3030 |
| Veterans Benefits/Claims | Veterans Information Center | (810) 257-3068 |
| Veterans Burial | Veterans Information Center | (810) 257-3068 |
| Veterans Discharge Records - Clerk | Clerks | (810) 257-3225 |
| Veterans Discharge Records - Veterans | Veterans Information Center | (810) 257-3068 |
| Veterans Trust Fund | Veterans Information Center | (810) 257-3068 |
| Victim/Witness Program | Prosecuting Attorney | (810) 257-3496 |
| Violent Crime Investigation | Prosecuting Attorney | (810) 257-3232 |
| Vision Screening | Public Health Department | (810) 257-3193 |
| Visitor Information (Jail) | Sheriff | (810) 257-3557 |
| Vital Records | Clerks | (810) 257-3225 |
| Volunteer/Foster Care | Circuit Court | (810) 257-3518 |
| Waste Management & Inspection | Public Health Department | (810) 257-3603 |
| Wastewater collection/treatment | Drain Commission | (810) 732-1590 |
| Water Quality Management | Public Health Department | (810) 257-3603 |
| Water Quality/Supply | Drain Commission | (810) 732-1590 |
| Water Safety | Sheriff | (810) 257-3176 |
| Water Systems Monitoring - Public | Public Health Department | (810) 257-3603 |
| Water Testing & Analysis | Public Health Department | (810) 257-3603 |
| Weatherization | GCCARD | (810) 787-9747 |
| WIC | Public Health Department | (810) 600-2430 |
| Wills & Decedent's Estates | Probate Court | (810) 257-3528 |
| Women, Infants & Children (WIC) | Public Health Department | (810) 600-2430 |
| Work Detail | Sheriff | (810) 768-7924 |
| Work First Program | GCCARD | (810) 257-3154 |
| Work Release | Sheriff | (810) 257-3412 |
| Youth Work Programs | GCCARD | (810) 232-2185 |
