Kayo Sakada is a Japanese voice actress affiliated with the agency Sigma Seven. She was born on March 23 in Osaka Prefecture.

Sakada began her career in voice acting in 2002, with early roles in the television anime Happy Lesson. In 2005, she played Suzuki Sayaka in Pani Poni Dash, a role considered one of her early representatives. The following year, in 2006, she voiced the character Asada in the original video animation TANK S.W.A.T. 01.

One of her most prominent roles came in 2010 when she voiced Ama Tsukimi Akira in the television anime series Yosuga no Sora, a performance frequently cited as a major representative work. Sakada has had a long-running association with the Magical Girl Lyrical Nanoha franchise. She first voiced the character Mariel Atenza in the 2005 series Magical Girl Lyrical Nanoha A's and has since reprised the role in multiple sequels and films, including Magical Girl Lyrical Nanoha StrikerS, Magical Girl Lyrical Nanoha ViVid, and the movie Magical Girl Lyrical Nanoha The MOVIE 2nd A's. She has also lent her voice to a wide variety of other anime, such as Fate/stay night, Hell Girl, Bamboo Blade, and xxxHOLiC.

Beyond anime, her career includes extensive work in video games and drama CDs. Notable game roles include Nanao Kikka in the ToHeart2 series, Kristes Seisa in Twinkle Crusaders, and Rio Inaba in DRACU-RIOT. She has also participated in radio programs related to her shows and contributed to museum audio guides for exhibitions, such as those for dinosaurs.