The David di Donatello Award for Best Supporting Actor () is a film award presented by the Accademia del Cinema Italiano (ACI, Academy of Italian Cinema) to recognize the outstanding performance in a supporting role of an actor who has worked within the Italian film industry during the year preceding the ceremony. It has been awarded every year since 1981.
Actors Giuseppe Battiston and Leo Gullotta are the record holders in this category, with three awards each.
Below, winners are listed first in the colored row, followed by other nominees.