Joss Fritz (c. 1470 – c. 1525) was a notable German insurgent, born as a serf in Untergrombach, Bruchsal.
In 1512, Fritz emerged as a leader in a progressive series of rebellions aimed at liberating peasants from local feudal and ecclesiastical rule.
Fritz was described as a soldier of commanding presence and great natural eloquence, used to battle and above all to patience.
Fritz was active in the Upper Rhine area, orchestrating at least three major Bundschuh revolts in 1502, 1512, and 1519.
Despite his efforts, these insurrections were quelled before they could fully manifest, primarily due to betrayals by his fellow conspirators.