| Thassilo Haun | |
| Birth Date: | 1973 11, df=yes |
| Birth Place: | Saarbrücken, Germany |
| Plays: | Left-handed |
| Careerprizemoney: | $1,511 |
| Singlesrecord: | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 582 (26 August 1996) |
| Doublesrecord: | 0–1 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 851 (11 November 1996) |
| Updated: | 20 February 2017 |
Thassilo Haun (born 21 November 1973) is a retired German tennis player.
Haun has a career high ATP singles ranking of 582 achieved on 26 August 1996. He also has a career high ATP doubles ranking of 851 achieved on 11 November 1996.
Haun made his ATP main draw debut at the 2011 Austrian Open Kitzbühel in the doubles draw partnering Stefan Koubek.