August Prosenik (25 April 1916 – 22 July 1975) was a Yugoslav amateur road cyclist. He competed in the individual and team events at the 1936 and 1948 Summer Olympics and placed 12th individually in 1936.^[2] He won the Tour of Romania in 1946 and the Peace Race in 1948.^[3]

Prosenik grew up in a poor family, as his father became disabled after a mining accident. In 1930 he moved to Zagreb and worked there as a workshop mechanic and then as a car mechanic. After retiring from competitions he became a cycling coach and a sports administrator.^[4]