Donna D'Errico (born March 30, 1968) is an American actress best known for her starring role as Donna Marco on the popular television series Baywatch from 1996 to 1998. Before gaining fame on Baywatch, she appeared as Playboy's Playmate of the Month for September 1995 and later hosted Battlebots. Her career also includes appearances in independent films and Candyman: Day of the Dead.

In her personal life, D'Errico was married to Mötley Crüe bassist Nikki Sixx for 11 years, divorcing in 2007, and they share a daughter born in 2001, in addition to her son Rhyan from a previous relationship. A devout Roman Catholic, she is also a vegan and a vocal supporter of animal rights. In a remarkable personal quest, D'Errico embarked on an expedition in 2012 to climb Mount Ararat in Turkey, aiming to fulfill a long-held dream of searching for the biblical Noah's Ark, though she sustained injuries from a fall during the ascent.