Leo John Donnellan (born 19 January 1965) is an Irish former footballer who played professionally for Fulham as a midfielder. He was also capped by the Republic of Ireland Under 18 and Republic of Ireland Under 21 sides in 1983 and 1985.
Donnellan is the father of Leo Donnellan Jr who played for Enfield Town and Shaun Donnellan, who plays for Livingston and the brother of fellow professional footballer Gary Donnellan.