Józef Dietl (24 January 1804 in Podbuże near Sambor – 18 January 1878 in Kraków) was an Austrian-Polish physician born to an Austrian father and Polish mother. He studied medicine in Lviv and Vienna. He was a pioneer in balneology, and a professor of Jagiellonian University, elected as its rector in 1861. Dietl described the kidney ailment known as "Dietl’s Crisis" as well as its treatment.
From 1866 to 1874, Dietl was mayor of the city of Kraków.