Yoko Shimomura (born October 19, 1967) is a composer and pianist from Hyōgo Prefecture, Japan. Shimomura is primarily known for her work in video games. From 1988 to 1993, she worked with video game company Capcom and composed for popular games Final Fight and Street Fighter II. From 1993 to 2002, she worked with the company Square, composing for popular games such as the original Kingdom Hearts and Mario & Luigi: Superstar Saga.

From 2003 on, she became a freelance composer, composing for different companies. However, this did not stop Shimomura from continuing her work with Square. She became famous for tracks she composed in the Kingdom Hearts series and Super Mario RPG, as well as the recent Final Fantasy XV.