| Hernst Marktl | |
| Fullname: | Hernst Xavier Marktl |
| Birth Date: | 23 June 1887 |
| Birth Place: | Ettringen, Germany |
| Position: | Defender |
| Clubs1: | Internazionale |
| Years1: | 1909 |
| Caps1: | 2 |
| Goals1: | 0 |
Hernst Marktl (23 June 1887 – ?) was a German footballer who played as a defender. Throughout his club career, he played for Italian side Internazionale, also serving as the team's captain.