| Company | Category | Area | Address | Web | Contact person | |
| OHNSTADS SERVICE CENTER | Ret Hardware Ret Nursery/garde | Wisconsin | 12012 CENTER HILL RD, DARLINGTON, Lafayette, Wisconsin, 53530-9766, USA | - | - | David Ohnstad |
| OHNWARD BANCSHARES INC | Holding Companies (Bank) | Iowa | 203 N MAIN ST, MAQUOKETA, Jackson, Iowa, 52060-2204, USA | www.ohnward.com | - | Alan Tubbs |
| OHNWARD FINE ARTS CTR | Artists-Fine Arts | Iowa | 1215 E PLATT ST, MAQUOKETA, Jackson, Iowa, 52060-2536, USA | - | - | - |
