Julien Prosser (born 11 June 1972 in Bunbury, Western Australia) is a male beach volleyball player who represented Australia in three consecutive Summer Olympics, starting in 1996.
Australia's most successful player ever, Three Olympic Games - Atlanta (9th), Sydney (9th) and Athens (4th), 144 FIVB World Tour events and winning 14 Australian National Titles, playing more international beach volleyball games than anyone in the world.
One of fourteen players to play in the first four Olympic Beach Volleyball competitions since its induction in 1996, Prosser placed ninth in both 1996 and 2000 with Lee Zahner. He and Mark Williams ended up in fourth place at the 2004 Summer Olympics, where they lost twice to Switzerland's Patrick Heuscher and Stefan Kobel, including a 19-21, 21-17 and 15-13 bronze medal decision.