Franjo "Mara" Wölfl (sometimes spelled Velfl; 18 May 1918 – 8 July 1987) was a Croatian and Yugoslav footballer who played as a forward in the period between the late 1930s and early 1950s.

A prolific goalscorer, Wölfl spent most of his career playing for his hometown clubs 1.

He was also a Yugoslavia international, both before and after World War II, and was part of the squad which won the silver medal at the 1948 Summer Olympics in London.

After retiring in 1953, he briefly co-managed Yugoslavia during the 1954 FIFA World Cup qualifiers.

After World War II, Građanski was disbanded by the communist authorities and Wölfl moved to the regime's newly formed club Dinamo Zagreb.