Olivier Saminadin (born 6 September 1977) is a French swimmer from New Caledonia.

Due to New Caledonia's status as an overseas territory of France, and its current lack of official recognition by the International Olympic Committee, Saminadin (like other swimmers from New Caledonia, such as Diane Bui Duyet), swims for New Caledonia in regional (Pacific) competition, and for France in continental and above championships.

title at the first French Short Course Championships in January 2005.

At the 2003 South Pacific Games he won the 200, 400 and 1500 frees, the 200 fly, the 400 individual medley and the open water race; and was also part of all 3 New Caledonia's relays, each which also won.

At the 2007 South Pacific Games, he defended his titles in both 400s (free and I.M.