| Business | Phone |
| Victim Assistance St St Charles 63301 | (636) 949-7370 |
| St Charles Cnty Facility Mgmt 300 N 2nd St # 101, St Charles 63301 | (636) 949-3034 |
| St Charles Cnty Public Dfndr 200 N 2nd St, St Charles 63301 | (636) 949-7300 |
| St Charles Cnty Public Dfndr 300 N 2nd St # 264, St Charles 63301 | (636) 949-7300 |
| St Charles Cnty Recorder-Deeds 201 N 2nd St, St Charles 63301 | (636) 949-7505 |
| St Charles County 911 Msag 301 N 2nd St # 280, St Charles 63301 | (636) 949-7481 |
| St Charles County Bldg Dept 201 N 2nd St # 412, St Charles 63301 | (636) 949-7345 |
| St Charles County Child Spprt 300 N 2nd St # 216, St Charles 63301 | (636) 949-3085 |
| St Charles County Collector 201 N 2nd St # 134, St Charles 63301 | (636) 949-7470 |
| St Charles County Construction 201 N 2nd St, St Charles 63301 | (636) 949-1820 |
| St Charles County Council 100 N 3rd St, St Charles 63301 | (636) 949-7540 |
| St Charles County Courts 300 N 2nd St, St Charles 63301 | (636) 949-3087 |
| St Charles County Director-Adm 100 N 3rd St # 318, St Charles 63301 | (636) 949-7520 |
| St Charles County Jury Svc 300 N 2nd St # 215, St Charles 63301 | (636) 949-3088 |
| St Charles County Mis Dept 201 N 2nd St # 313, St Charles 63301 | (636) 949-7480 |
| St Charles County Personnel 201 N 2nd St, St Charles 63301 | (636) 949-7320 |
| St Charles County Probate Ct 300 N 2nd St # 512, St Charles 63301 | (636) 949-3086 |
| St Charles County Public Adm 300 N 2nd St # 233a, St Charles 63301 | (636) 949-7315 |
| St Charles County Registrar 100 N 3rd St # 206, St Charles 63301 | (636) 949-7560 |
| St Charles County Sign Dept 1210 Lindenwood Ave, St Charles 63301 | (636) 916-3736 |
| St Charles Juvenile Div 1700 S River Rd, St Charles 63303 | (636) 949-3040 |
| St Charles Weldon Spring Prjct 100 N 3rd St, St Charles 63301 | (636) 949-7545 |
| Juvenile Justice Ctr 1700 S River Rd, St Charles 63303 | (636) 949-3038 |
| Highway Maintenance Dept 1210 Lindenwood Ave, St Charles 63301 | (636) 724-5241 |