| Business | Phone |
| Girdner Insurance 1515 Elmwood Dr, Onawa 51040 | (712) 423-2696 |
| Hoffman Agency 1016 10th St, Onawa 51040 | (712) 433-2481 |
| Monona County Farm Bureau 920 9th St, Onawa 51040 | (712) 423-2742 |
| Monona County Mutual Ins Assn 906 7th St, Onawa 51040 | (712) 423-1272 |
| State Farm Insurance 915 Iowa Ave, Onawa 51040 | (712) 423-1234 |
| Thams Insurance Inc 317 10th St, Onawa 51040 | (712) 423-3075 |
| Zima Insurance & Investments 910 Iowa Ave, Onawa 51040 | (712) 423-1162 |