Natsumi Kawaida (川井田 夏海, Kawaida Natsumi, born February 18, 1996) is a Japanese voice actress (seiyuu) from Aichi Prefecture. She belongs to Intention K.

In 2009, she appeared in the Marumiya food musical Annie as one of the child actors of the Pepper of the Tomorrow group. Her co-stars in child roles at the time also included Reika Uyama. She attended a workshop at the Intention K agency and made her debut as a voice actress in the TV anime Kira Kira☆PreCure a la Mode in 2017. On September 15 of the same year, she became a member of the same agency and began her career as a professional voice actress. Her first starring role was as Akino in the TV anime series The Concierge.