| Business | Phone |
| Iowa County Engineer 400 E Pine St, Marengo 52301 | (319) 642-3721 |
| Iowa County Extension 1099 Court Ave, Marengo 52301 | (319) 642-5504 |
| Iowa County Garage 489 E Miller St, Marengo 52301 | (319) 642-5621 |
| Iowa County Recorder 901 Court Ave, Marengo 52301 | (319) 642-3622 |
| Traffic Clerk 901 Court Ave, Marengo 52301 | (319) 642-5430 |
| Iowa Supervisor's Office 901 Court Ave 1, Marengo 52301 | (319) 642-3041 |