Leon Tochowicz (18 July 1897 – 29 July 1965) was a Polish internist and cardiologist.
For three terms he was a rector of the Medical Academy in Kraków (1957–65), and was referred to as the "founder of the Kraków school of cardiology".
He was the author of nearly one hundred original research papers, mostly in the field of clinical cardiology, and was the initiator of the construction of the Institute of Pediatrics in Kraków-Prokocim, nowadays the University Children's Hospital in Kraków.
Fighting in the ranks of the Polish Army, he took part in the Polish–Soviet War (1918–1920) and in the 1939 Defensive War.
In November 1939 he was imprisoned during the Sonderaktion Krakau action, and was sent to Sachsenhausen concentration camp.