Stacy Valentine (born Stacy Baker on August 9, 1970) is a former American porn star.

Adopted by her parents in Tulsa, Oklahoma and married at a young age, Baker was pressured by her second husband to get breast implants and pose for Gallery magazine's amateur photo contest (voyeuristically named The Girl Next Door.) She won the contest, and parlayed this into a follow-up spread in Hustler magazine. Soon she was booked for two more layouts in Hustler and began to enjoy the attention and the ego-boost that came from getting paid for being beautiful and sexy. With her nude modeling career taking off, Baker's husband gave her an ultimatum: him or the business. Baker ditched her husband, and moved to Los Angeles to begin her adult film career.

Valentine took her stage name from the fact that she appeared in her first adult film on February 14 1996. Her last film was made exactly four years later in 2000. Valentine knew early on she did not want to be in the adult industry too long. "The goal when you get into the business is that you want to be a contract girl and you want to get the awards. I was a contract girl. I got the awards. I fought very hard to climb that ladder and I would be damned if I was going to climb down it. So I thought, this is a perfect time to make my exit."

Currently Valentine lives in California working as a Director of Model Recruitment for Penthouse magazine.