August Lešnik (Croatian pronunciation: [august lê?nik]; 16 July 1914 in Zagreb – 24 February 1992 in Zagreb) was a Croatian footballer.
Lešnik played most of his club football for Gradanski Zagreb.
In 1941 he was the Croatian First League's top scorer while playing for Gradanski, and performed the same feat twice in the Yugoslavian First League as well: in 1938 and 1939.
He played for the Yugoslavian football team in the late 1930s and the Croatian national team from 1940 to 1944.