Mariko Kōda (國府田 マリ子, Kōda Mariko?) (sometimes romanized Mariko Kouda) is a seiyū, J-Pop singer and radio personality born on September 5, 1969 in Miyashiro, Minami Saitama, Saitama Prefecture, Japan. She graduated from Kasukabe Kyōei High School and went on to major in Communications at Tamagawa University in Machida City, Tokyo, graduating in 1990. Kōda has had at least one song appear on the NHK program Minna no Uta.
She works for the talent management firm Aoni Production. Her most notable roles include Kinu from Ghost Sweeper Mikami, Miki Koishikawa from Marmalade Boy and Shaorin from Mamotte Shugogetten.