Reiko Nanao was a Japanese actress known for both live-action and voice acting work. Her birth name is written as 七尾伶子, and she was born on January 12, 1925. Nanao passed away on July 2, 2006, at the age of 81.

Nanao's career as a screen actress spanned several decades, with her most prolific period being from the 1950s through the 1990s. Her live-action filmography includes notable Japanese cinema productions such as Akira Kurosawa's Red Beard (1965), where she played the role of Otoku, and the Academy Award-nominated film Black Rain (1989), in which she portrayed a character named Rui. She also appeared in the 1990 Akira Kurosawa film Dreams and the 1997 drama Tokyo Lullaby.

In the field of anime voice acting, Reiko Nanao is best known for her role in the 1982 Toei Animation theatrical film Aladdin and the Wonderful Lamp, known in Japanese as Sekai Meisaku Douwa: Arajin to Mahou no Ranpu (世界名作童話 アラジンと魔法のランプ). In this adaptation of the classic tale from One Thousand and One Nights, she provided the voice for the character Aladdin's Mother, the parent of the story's young protagonist. The film was directed by Yoshikatsu Kasai and featured a voice cast that included Kazuo Kamiya as Aladdin and Keiko Suzuka as Princess Badroulbadour. This production remains her most widely cited credit as a voice actor in animated works.