Rika Morinaga (森永 理科, Morinaga Rika, April 25, 1980) is a Japanese voice actress, stage actress, and singer. She is the lead vocalist of the band functioncode. She is currently affiliated with Mausu Promotion, and previously was affiliated with I'm Enterprise and Exellex.

In 2002, she formed the voice actor unit Mix JUICE (みっくすJUICE) with Kana Ueda, Chiwa Saito and Mai Nakahara. The following year, she made her debut as a voice actor in Wacky Science Fiction Series Wandaba Style, shortened to Wandaba Style, that starred with her unit members.