| population | |
| City of Onawa | 2998 |
| Township of Ashton | |
| Township of Belvidere | |
| Township of Center | |
| Township of Cooper | |
| Township of Fairview | |
| Township of Franklin |
 | Denison Municipal Airport | ~ 48.40 km |
| Sioux Gateway Airport / Brigadier General Bud Day Field | ~ 51.85 km |
| Scribner State Airport | ~ 74.09 km |
| Fremont Municipal Airport | ~ 81.55 km |
| Le Mars Municipal Airport | ~ 83.01 km |
| Eppley Airfield | ~ 83.41 km |
| Storm Lake Municipal Airport | ~ 84.72 km |
| Council Bluffs Municipal Airport | ~ 89.66 km |
| Arthur N Neu Airport | ~ 96.68 km |
