| Business | Phone |
| De Witt County Animal Shelter S Cain, Clinton 61727 | (217) 935-3033 |
| De Witt County Circuit Ct Clrk 201 W Washington St, Clinton 61727 | (217) 935-2195 |
| De Witt County Engineer 980 N 535 E, Clinton 61727 | (217) 935-2438 |
| De Witt County Esda 201 W Washington St, Clinton 61727 | (217) 935-9596 |
| De Witt County Maintenance 102 S Sherman St, Clinton 61727 | (217) 935-2264 |
| De Witt County Maintenance 201 W Washington St, Clinton 61727 | (217) 935-2264 |
| De Witt County Registration 201 W Washington St 109, Clinton 61727 | (217) 935-2119 |
| De Witt Supervisor-Assessments 201 W Washington St, Clinton 61727 | (217) 935-2242 |