Yui Okada (岡田 唯, Okada Yui?, born December 28, 1987 in Osaka, Japan) is a member of the J-pop group v-u-den (美勇伝, v-u-den?) associated with Hello! Project.
In June 2004, Okada successfully passed Hello! Project Egg Audition 2004 with 32 other people. Two months later, she joined former Morning Musume member Rika Ishikawa and "Tsunku♂ Produce Hello! Project Shin Unit" winner
In early 2006, she joined the new Hello! Project kickball team Metro Rabbits H.P..
Okada was casted in the Japanese film Sukeban Deka: Codename = Asamiya Saki as Tae Konno, released on September 30, 2006.