| Business | Phone |
| Mahaska County Auto Dept 106 S 1st St, Oskaloosa 52577 | (641) 673-4618 |
| Mahaska County Board-Sprvsrs 106 S 1st St, Oskaloosa 52577 | (641) 673-3469 |
| Mahaska County Courthouse 106 S 1st St, Oskaloosa 52577 | (641) 673-4940 |
| Mahaska County E911 Ctr 214 High Ave E, Oskaloosa 52577 | (641) 673-0347 |
| Mahaska County Engineer 2074 Old Highway 163, Oskaloosa 52577 | (641) 672-2897 |
| Mahaska County Gis Crdntr 106 S 1st St, Oskaloosa 52577 | (641) 673-1454 |
| Mahaska County Landfill 2979 Highway 63, Oskaloosa 52577 | (641) 673-9266 |
| Mahaska County Recorder 106 S 1st St, Oskaloosa 52577 | (641) 673-8187 |
| Mahaska County Relief Office 106 S 1st St, Oskaloosa 52577 | (641) 672-2625 |
| Mahaska County Shop 2074 Old Highway 163, Oskaloosa 52577 | (641) 673-6412 |
| Mahaska County Solid Wast Mgt 2979 Highway 63, Oskaloosa 52577 | (641) 673-0001 |
| Mahaska County Solid Wast Mgt 905 M Ave W, Oskaloosa 52577 | (641) 673-0001 |
| Mahaska County Veterans Affair 214 High Ave E, Oskaloosa 52577 | (641) 672-2625 |
| Mahaska County Veterans Affrs 106 S 1st St, Oskaloosa 52577 | (641) 673-7727 |