| Business | Phone |
| Grundy Cnty Recorder Of Deeds 700 Main St # 2, Trenton 64683 | (660) 359-5409 |
| Grundy County Circuit Clerk 700 Main St, Trenton 64683 | (660) 359-6605 |
| Grundy County Juvenile Officer 700 Main St # 13, Trenton 64683 | (660) 359-2347 |
| Grundy County Public Adm 700 Main St, Trenton 64683 | (660) 359-3177 |
| Grundy University Extension 700 Main St, Trenton 64683 | (660) 359-5643 |
| Road & Bridge Barn 476 Nw 5th Ave, Trenton 64683 | (660) 485-6719 |