Chrocus or Crocus, also Croc, Krokus, Crochus or Croscus (fl. 260–306) was a leader of the Alamanni in the late 3rd century. In 260, he led an uprising of the Alamanni against the Roman Empire, traversing the Upper Germanic Limes and advancing as far as Clermont, and possibly as far as Ravenna, and he was possibly present at the Alamannic conquest of the Frankish town of Mende.