| City Departments | | Newspapers | |
| | Daily American | 932-2146 |
| City Clerk | 932-3262 | S I Trader | 937-2850 |
| Fire Department non-emergency | 937-1234 | Southern Illinoisan | 529-5454 |
| Mayor | 932-3262 | | |
| Police Department non-emergency | 937-3502 | Schools | |
| Street Maintenance | 932-3262 | Regional Supt. Of Schools | 438-9711 |
| Trash Pick-up | 932-3262 | Superintendent – Dist #168 | 932-2421 |
| Water Utility | 937-4512 | Frankfort Intermediate. | 937-1412 |
| Wastewater Superintendent | 937-3079 | Denning Elementary | 9 37-2464 |
| Wastewater Treatment | 937-2031 | Central Junior High School | 937-2444 |
| | Frankfort Community High School | 932-3126 |
| Community Resources | | St. Johns Parochial School | 937-2017 |
| Aquatics & Activities Center | 937-1665 | | |
| Chamber of Commerce | 932-2181 | State/Federal Departments |
| Crosswalk Comm. Action Agency | 937-3581 | Drivers License Station | 438-4491 |
| Franklin Co. Housing | 932-2124 | National Guard Armory | 932-6162 |
| Franklin County Country Club | 932-3144 | Post Office | 937-4161 |
| Franklin/Williamson Human Service | 937-6483 | Social Security Office | 937-2431 |
| Historical Museum | 932-6159 | | |
| Library | 932-3313 | State Representatives | |
| Man-Tra-Con Resource Center | 937-6005 | Senator Forby | 439-2504 |
| WFRX Radio Station | 932-2181 | Representative Costello | 937-6402 |
| Wit & Wisdom (Senior Center) | 937-3511 | Representative Bradley | 997-9697 |
| | | |
| County Offices | | Township Offices | |
| Animal Control | 439-9197 | Denning | 932-3565 |
| Bi-County Health | 439-0951 | Frankfort | 937-1841 |
| Circuit Clerk | 439-2011 | | |
| Coroner | 439-6850 | Transportation | |
| County Clerk | 438-3221 | Bart Transportation to St. Louis | 800-284-2278 |
| County Treasurer | 438-7311 | Benton Municipal Airport | 435-3526 |
| Election Office | 439-3403 | Williamson County Airport | 993-4276 |
| Sheriff Department | 438-8211 | | |
| States Attorney | 439-4316 | Utilities | |
| Supervisor of Assessments | 438-4331 | J.U.L.I.E. | 800-892-0123 |
| | Ameren CIPS | 888-789-2477 |
| Hotels | | Cingular - Wireless | 800-331-0500 |
| American Best Value Inn | 932-2171 | First Cellular | 800-423-5560 |
| Gray Plaza Motel | 932-3116 | Mediacom Cable | 800-874-2924 |
| | Verizon – Business | 800-483-5000 |
| Medical | | Verizon – Residence | 800-483-4000 |
| Franklin Hospital | 439-3161 | Verizon – Wireless | 800-922-0204 |
| Miners Memorial Health Center | 932-2155 | | |
| Poison Control Center | 800-222-1222 |
