Rika Ishikawa (石川 梨華, Ishikawa Rika), born January 19, 1985, Yokosuka, Kanagawa Prefecture, Japan) is a Japanese pop singer, TV and radio hostess, associated with the Hello! Project banner and best known as a former member of Hello! Project's mothership band, the J-pop all-female supergroup Morning Musume. She is currently the leader of the trio v-u-den and the host of the TV show Hello! Morning.

Ishikawa joined Morning Musume as a fourth generation member along with Hitomi Yoshizawa, Nozomi Tsuji, and Ai Kago, and made her debut in 2000 along with the rest of the fourth generation on the band's tenth single, "Happy Summer Wedding".