Maggie Blue O'Hara, also credited as Maggie O'Hara, is a Canadian actress noted for her voice acting. She is well known as the voices of Madison Taylor in Cardcaptors and Shadowcat in X-Men: Evolution.

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O'Hara appeared in many television series and TV movies, including The X-Files, Da Vinci's Inquest, Hope Island, Neon Rider and three years as a regular on the CBC TV series Northwood.

In 2005, O'Hara and her then husband, renowned Hong Kong sand-painting artist and animator Hoi Chiu, formed All Theatre Art Association, which created shows and toured them internationally to places such as England, Canada, Taiwan, China, Singapore, Thailand, Australia and New Zealand. While living in Hong Kong, O'Hara provided voices for name-brand electronic toys such as VTech and cartoon series such as The Adventures of Hello Kitty & Friends.^{[citation needed]}

In early 2015, after nearly 10 years in Hong Kong, Maggie Blue returned to British Columbia to live.