Anton Casimir Dilger (13 February 1884 – 17 October 1918) was a German-American medical doctor, and the main proponent of the German biological warfare sabotage program during World War I.
His father, Hubert Dilger, was a United States Army captain who had received the Medal of Honor for his work as an artilleryman at the Battle of Chancellorsville (1863) during the American Civil War.