Jirí Vokner (born May 12, 1931) is a Czechoslovak sprint canoer who competed in the mid to late 1950s.
He won three medals at the ICF Canoe Sprint World Championships with one gold (1954: C-1 10000 m) and two silvers (1958: C-1 1000 m, C-1 10000 m).
Vokner also finished fourth in the C-1 10000 m event at the 1956 Summer Olympics in Melbourne.