| Horst Kassner | |
| Nationality: | German |
| Gp Active Years: | 1956, 1958 – 1959 |
| Gp Teams: | NSU |
| Gp Race Starts: | 9 |
| Gp Race Wins: | 0 |
| Gp Podiums: | 2 |
| Gp Total Points: | 12 |
| Gp Poles: | N/A |
| Gp Fastest Laps: | N/A |
| Gp First Race: | 1956 250cc Isle of Man Lightweight TT |
| Gp Last Race: | 1959 250cc Isle of Man Lightweight TT |
Horst Kassner (12 May 1937 – 21 April 2019) was a Grand Prix motorcycle road racer from Germany. His best year was in 1956 when he finished the season in fourth place in the 250cc world championship.[1]