| Name: | William Kostelny |
| Gender: | Male |
| Agency: | Naperville Fire Department |
| Type of Firefighter: | Career |
| Rank: | Firefighter |
| Type of Duty: | |
| Type of Award: | Medal of Honor |
| Year of Award: | 2015 |
| Incident City: | Unknown |
| Year of Incident: | Unknown |
| Incident Location Type: | |
| Incident Attribute: |