Shion Wakayama (若山 詩音, Wakayama Shion, born February 10, 1998) is a Japanese voice actress (seiyuu) and former child actress. She was born in Chiba Prefecture and is affiliated with Himawari Theater Group.

Shion joined Himawari Theater Group when she was 3 years old. She was scouted when she went to accompany her sister, who was a child actress. Since middle school she showed interest in voice acting because of her passion for video games. While in high school, she joined the art club, and in college, she was the bassist of a light music circle. Later, she became a voice actress and played her first lead role as Aoi Aoi in the anime film Her Blue Sky. Some of her major roles include Destiny/Cosette in Takt Op. Destiny and Mai Kawai in Police in a Pod.