Tarcy Su (Chinese: 蘇慧倫; pinyin: Sū Huìlún; Pe̍h-ōe-jī: So͘ Hūi-lûn; born 27 October 1970) is a Taiwanese singer and actress who was most popular in the 1990s during her recording career with Rock Records.

In 2021, she was nominated for Best Female Mandarin Singer in the 32nd Golden Melody Awards for her rendition in Every Side of Me.

Her most popular albums were: Lemon Tree (1996), where she sang a Mandarin cover of the song by Fool's Garden (a Cantonese cover is available on her Cantonese solo album); Duck (1996), where she covered a pop song by South Korean band JuJu Club; and The Fool (1997), where the title track was composed by Singaporean group Padres.

In 2020, Su released her sixteenth Mandarin album, Every Side of Me, under her new company B'in Music.

She married her boyfriend of two years, Jimmy Sun (孫益民), who has a 7-year-old daughter from a previous marriage, in Hokkaido in March 2014.