Marijan Vlak (born 23 October 1955 in Sisak) is an Croatian former football goalkeeper and the manager of Budapesti Vasas SC.
He spent his playing career as a goalkeeper for Dinamo Zagreb, NK Zagreb and Segesta Sisak. Although he was never capped for the Yugoslavia national football team he was on Miljan Miljanić's broader list for the 1982 FIFA World Cup, but failed to make the final cut.
Vlak started his managerial career in 1990.