Sammy Giammalva Jr. (born March 24, 1963) is a former professional tennis player from the United States. During his career he won 2 singles titles and 4 doubles titles. He achieved a career-high singles ranking of World No. 28 in 1985 and a career-high doubles ranking of World No. 22 in 1984.
Giammalva's father Sam played top-level amateur tennis and participated on two Davis Cup winning teams for the U.S. His older brother Tony was also a touring pro.
Giammalva left the Grand Prix tour in 1989 and enrolled in Rice University.