Moeka Koizumi (小泉萌香, February 27, 1996) is a Japanese actress, voice actress and singer from Amagasaki, Hyogo Prefecture. She is affiliated with Amuse. After winning the grand prix in the singing & voice acting area of Amuse Audition Festival 2014, she made her debut in 2015.

In 2021, she formed "harmoe" with Haruki Iwata, managed by Pony Canyon. Their 1st single "Kimagure Tictack" reached the 11th place on the daily Oricon Singles Chart.