Antonios Papaioannou (Greek: Αντώνηος Παπαϊωάννου) was a Greek gymnast.
He competed at the 1896 Summer Olympics in Athens.
[1] Papaigannou competed in the parallel bars and horizontal bar individual events.
He did not win medals in either competition, though his exact ranking is unknown.
This biographical article related to Greek artistic gymnastics is a stub.