| Office | Phone | Email |
| Assessor | 712-957-3205 | lthomas@obriencounty.org |
| Attorney | 712-957-3375 | rbecker@obriencounty.org |
| Auditor | 712-957-3225 | brohwer@obriencounty.org |
| Clerk of Court | 712-957-3255 | obrien.county.clerk@iowacourts.gov |
| opens in a new windowConservation | 712-295-7200 | occb@iowatelecom.net |
| opens in a new windowDriver License | 712-957-3208 | lscroggin@obriencounty.org |
| opens in a new windowEmergency Management | 712-757-4305 | jjohnson@obriencounty.org |
| opens in a new windowEngineer | 712-957-3425 | engineers@obriencounty.org |
| opens in a new windowGeneral Assistance/Mental Health | 712-957-5985 | awallin@obriencounty.org |
| opens in a new windowMaintenance | 712-957-3235 | rthompson@obriencounty.org |
| opens in a new windowPublic Health/Sanitation | 712-957-0105 | jnieuwenhuis@obriencounty.org |
| opens in a new windowMotor Vehicle | 712-957-4185 | bscroggin@obriencounty.org |
| opens in a new windowRecorder | 712-957-3045 | ssmith@obriencounty.iowa.gov |
| opens in a new windowSheriff | 712-757-3415 | sheriff@obriencountysheriff.com |
| opens in a new windowTreasurer | 712-957-3210 | mhattermann@obriencounty.org |
| opens in a new windowVeteran’s Affairs | 712-957-0031 | rwohlert@obriencounty.org |
