This is a list of winners and nominees of the Golden Horse Award for Best Supporting Actor.

Old Fox is a 2023 drama film directed by Hsiao Ya-chuan. The film follows a young boy who befriends his landlord, nicknamed Old Fox, and tells the story of Taiwan's rapidly changing society of the late 1980s. The cast includes Bai Run-yin, Liu Kuan-ting, Akio Chen, Mugi Kadowaki, and Eugenie Liu. The film is dedicated to the director's mother.