Anton Weichselbaum (8 February 1845 – 23 October 1920) was an Austrian pathologist and bacteriologist born near the town of Langenlois. Weichselbaum was among the first scientists to recognize the importance of bacteriology for the field of pathological anatomy. Some of his better known assistants were serologist Karl Landsteiner (1868–1943), bacteriologist Anton Ghon (1866–1936) and dermatologist Josef Kyrle (1880–1926). Weichselbaum was a son-in-law to chemist Franz Schneider (1812–1897). Weichselbaumgasse, a thoroughfare in the Favoriten district of Vienna is named in his honor.