| Fabian Windhager | |
| Birth Date: | 7 September 2001 |
| Birth Place: | Austria |
| Position: | Defender |
| Currentclub: | Blau-Weiß Linz |
| Clubnumber: | 22 |
| Youthclubs1: | FC Red Bull Salzburg |
| Years1: | 2018–2021 |
| Clubs1: | Liefering |
| Caps1: | 5 |
| Goals1: | 0 |
| Years2: | 2020–2021 |
| Clubs2: | → USK Anif (loan) |
| Caps2: | 9 |
| Goals2: | 1 |
| Years3: | 2021– |
| Caps3: | 53 |
| Goals3: | 3 |
| Nationalyears1: | 2016 |
| Nationalteam1: | Austria U-15 |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2020– |
| Nationalcaps2: | 1 |
| Nationalgoals2: | 0 |
| Club-Update: | 18 December 2023 |
| Nationalteam-Update: | 4 March 2020 |
Fabian Windhager (born 7 September 2001) is an Austrian footballer who plays as a defender for Second League club Blau-Weiß Linz.