Frank John Lubin (Lithuanian: Pranas Lubinas; 1910 January 7 – 1999 July 8) was an American basketball player. Lubin was born in East side of Los Angeles, California to a family of Lithuanian immigrants. He studied at the UCLA then played in AAU tournaments for about 30 years. In 1997 he entered the UCLA Hall of Fame.
Lubin became an Olympic champion with the US team in 1936 in Berlin, and a European champion with the Lithuanian team in 1939 in Kaunas. He is often called the "Grandfather of Lithuanian basketball" as he promoted basketball in Lithuania and helped Lithuania to win its second consecutive European championship.