| Ernst Seidler von Feuchtenegg | |
| Office: | Minister-President of Austria |
| Term Start: | 23 June 1917 |
| Term End: | 27 July 1918 |
| Predecessor: | Heinrich Clam-Martinic |
| Successor: | Max Hussarek von Heinlein |
| Birth Date: | 5 June 1862 |
| Birth Place: | Schwechat, Lower Austria, Austrian Empire |
| Death Place: | Vienna, Austria |
Ernst Wilhelm Engelhardt Ritter Seidler von Feuchtenegg (5 June 1862, Schwechat, Lower Austria – 23 January 1931, Vienna) was an Austrian statesman. He served as Minister-President of Austria from 1917 until 1918. His daughter was the actress Alma Seidler.