| Ernst Plener | |
| Fullname: | Ernst Plener |
| Birth Date: | 21 February 1919 |
| Birth Place: | Kattowitz, Germany[1] |
| Death Date: | [2] |
| Position: | Forward |
| Years1: | 1937–1941 |
| Clubs1: | Vorwärts Gleiwitz |
| Years2: | 1943–1944 |
| Clubs2: | HSV Groß Born |
| Nationalyears1: | 1940 |
| Nationalteam1: | Germany |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 2 |
Ernst Plener (21 February 1919 – 16 March 2007) was a German international footballer who played for Vorwärts Gleiwitz and HSV Groß Born.