The 1st Prussian Infantry Regiment (von Kunheim) (German: 1. Preußisches Infanterieregiment) was a line infantry regiment of the Old Prussian Army which had initially formed part of the , but later transferred to the line. After notably serving in the War of the Austrian Succession and Seven Years' War, the regiment was demolished following the Battle of Auerstadt. A small part of the regiment went on to help form the famed , which in turn would serve notably till its disbandment after World War I.