Leon Jan Wachholz (Wacholz) (June 20, 1867 – December 1, 1942) was a Polish scientist and medical examiner. He researched and taught as a professor of forensic and social medicine at the Jagiellonian University between 1896 and 1933 and published formative works on forensics. He is considered to be one of the most important representatives of forensic medicine in Poland in the 20th century and creator of the modern Polish forensic medical school. He authored over 200 papers in forensic medicine and medical history both in German and Polish.