| Business | Phone |
| Grundy County Sanitarian Grundy Center 50638 | (319) 824-1212 |
| Grundy County Auto Dept 706 G Ave, Grundy Center 50638 | (319) 824-3132 |
| Grundy County Board-Supervisor 706 G Ave, Grundy Center 50638 | (319) 824-5813 |
| Grundy County Engineer Office 22580 M Ave, Grundy Center 50638 | (319) 824-6912 |
| Grundy County Extension Svc 703 F Ave 1, Grundy Center 50638 | (319) 824-6979 |
| Grundy County General Relief 704 1/2 H Ave, Grundy Center 50638 | (319) 824-6867 |
| Grundy County Highway Oper 22580 M Ave, Grundy Center 50638 | (319) 824-3210 |
| Grundy County Home Care Svc 802 1st St, Grundy Center 50638 | (319) 824-6312 |
| Grundy County Homemakers 802 1st St, Grundy Center 50638 | (319) 824-3398 |
| Grundy County Information Tech 706 G Ave, Grundy Center 50638 | (319) 824-5164 |
| Grundy County Landfill 20434 220th St, Grundy Center 50638 | (319) 824-6967 |
| Grundy County Maintenance Shp 22580 M Ave, Grundy Center 50638 | (319) 824-3275 |
| Grundy Senior Ctr 705 F Ave, Grundy Center 50638 | (319) 824-3843 |
| Grundy County Recorder Office 706 G Ave, Grundy Center 50638 | (319) 824-3234 |