Patricia Hy-Boulais (b. August 22, 1965, Phnom Penh, Cambodia) is a former tennis player. She turned professional on October 12, 1986. Early in her career she represented Hong Kong (since the beginning until the end of the 1987 season). She became a citizen of Canada in 1991. However, she represented Canada just since the beginning of the 1988 season.
After Hy-Boulais did it in 1992, Canada did not have another woman to survive into the second week at the French Open until Aleksandra Wozniak did it in 2009.
Hy-Boulais represented her new country at the 1996 Summer Olympics in Atlanta, Georgia, where she was eliminated in the second round by the number one seed Monica Seles. Hy-Boulais reached her highest ranking in the WTA Tour on March 8, 1993, when she became the number 28 of the world.