No cause of death has been disclosed; however, a family member told TMZ that Crough's passing was "sudden."
Born in Fullerton, Calif., Crough starred as the tambourine-wielding daughter Tracy on The Partridge Family from 1970 to 1974. She had small roles on TV shows and movies after the show ended, but quit acting in 1980 and went on to open a bookstore.
In 2010, she and some of her Partridge Family castmates reunited on the Today show, and Crough said she was working as a manager at an Office Max in Arizona.
Crough is survived by a husband and two daughters.