Reiko Sato (Japanese: レイコ・佐藤; December 19, 1931 – May 28, 1981) was an American dancer and actress.
Sato was born in Los Angeles, California, to an issei Zen Buddhist priest, Ken-ichi Sato, and his wife Chieko. She and her family were interned at the Gila River War Relocation Center during World War II. Her mother became a real estate investor after the war; Reiko also had an older brother, Keiichiro, and a younger brother, Koji. She graduated from Belmont High School in 1949, later attending Los Angeles City College. She continued her studies in ballet.
Sato is best known for playing seamstress Helen Chao in the 1961 feature film Flower Drum Song. She also had a dramatic role in The Ugly American, receiving personal coaching from actor Marlon Brando with whom she had a relationship. She had been on contract with Fox and Universal, but nothing materialized, and she retired from Hollywood.
