| Ernst Arndt | |
| Birth Date: | 3 February 1861 |
| Birth Place: | Magdeburg, Kingdom of Prussia |
| Death Date: | (aged 81) |
| Death Place: | Treblinka extermination camp, General Government (Nazi-occupied Poland) |
| Occupation: | Actor |
Ernst Arndt (3 February 1861 –) was a German Jewish stage and film actor notable for his later career in Austria.
Arndt was born in Magdeburg, Kingdom of Prussia. From 1910 he was a member of the Burgretheater ensemble in Vienna. He also made occasional appearances in supporting roles in films. On 13 March 1931, he was made an Honorary Citizen of Vienna.
On 10 July 1942, at the age of 81, he was deported to the Theresienstadt Ghetto, and from there on 23 September of the same year to Treblinka extermination camp, where he is presumed to have been murdered shortly afterward.