| Ortschaft | Postleitzahl |
|---|---|
| Bono, Ottawa | 43445 |
| Catawba Island, Ottawa | 43452 |
| Clay Center, Ottawa | 43408 |
| Curtice, Ottawa | 43412 |
| Elliston, Ottawa | 43432 |
| Elmore, Ottawa | 43416 |
| Genoa, Ottawa | 43430 |
| Graytown, Ottawa | 43432 |
| Gypsum, Ottawa | 43433 |
| Isle Saint George, Ottawa | 43436 |
| Lacarne, Ottawa | 43439 |
| Lakeside, Ottawa | 43440 |
| Lakeside Marblehead, Ottawa | 43440 |
| Marblehead, Ottawa | 43440 |
| Martin, Ottawa | 43445 |
| Middle Bass, Ottawa | 43446 |
| Oak Harbor, Ottawa | 43449 |
| Port Clinton, Ottawa | 43452 |
| Put in Bay, Ottawa | 43456 |
| Reno Beach, Ottawa | 43412 |
| Rocky Ridge, Ottawa | 43458 |
| Williston, Ottawa | 43468 |