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.

She married politician and attorney Hideyuki Aizawa. Their son Hiromitsu married singer and actress Shoko Aida. She's been awarded the Medal with Purple Ribbon (2003) and the Order of the Rising Sun, 4th Class, Gold Rays with Rosette (2010).