Wendy Wilson (born October 16, 1969) is a singer and member of the pop singing trio, Wilson Phillips. Born in Los Angeles, California, she is the daughter of The Beach Boys founder Brian Wilson, and his first wife Marilyn; a member of girl group The Downeys; and she is the younger sister of Carnie Wilson.

Wilson co-founded Wilson Phillips with Carnie and childhood friend Chynna Phillips, when they were in their teens. They went on to release two albums, in 1990 and 1992, before they split up. Wendy and Carnie then went on to release a Christmas album together in 1993, and an album called The Wilsons in 1997, with their estranged father, Brian. In 2004, Wendy reunited with Carnie and Phillips for a third Wilson Phillips album entitled California.

She married record producer / sound engineer Daniel Knutson on May 24, 2002 in the rose garden of The Ritz-Carlton in Marina Del Rey, and they have four sons.