Yōko Aizawa (相澤 葉子, Aizawa Yōko, born August 20, 1934) is a Japanese actress. She won the award for best actress at the 17th Blue Ribbon Awards for Kinokawa. She is a professor at Tokyo University of Social Welfare and serves as the 2nd head of Nihon Taishōmura theme park.

Born as Yōko Shōji (庄司 葉子) in Tottori Prefecture, to a family of cotton merchants who had settled in Yumihama. Her family is a branch of the Shōji family, the landed magnate of Watari.