 | Airports: United States: William E. Koenig Airport | |
| Airport name: | William E. Koenig Airport |
| Airport code (ICAO): | 01IS |
| Latitude: | 39.0162 |
| Longitude: | -90.3182 |
| Height above sea: | 670 ft / 204 m |
| Country: | United States - North America |
| Region: | Illinois |
| City: | Dow |
| Airlines scheduled services: | no |