Sarah "Sallie" Polk Jetton Fall (April 1, 1847 – July 22, 1924) was a wealthy Nashville socialite and philanthropist. She was the great-niece and unofficially adopted daughter of former First Lady Sarah Childress Polk. Sallie's mother died when she was only a few months old. Sallie lived with her great-grandmother, who gave Sallie to her daughter Sarah after the death of Sarah's husband President James K. Polk.