Heidy Marleny Juárez Guzmán (born May 14, 1977 in Los Angeles) is a Guatemalan taekwondo practitioner, who competed in the women's welterweight category. She picked up a total of eight medals in her career, including a silver from the 2007 Pan American Games in Rio de Janeiro, Brazil, and a bronze from the 1995 World Taekwondo Championships in Manila, Philippines, and finished fourth in the 67-kg division at the 2004 Summer Olympics, narrowly missing a chance to become Guatemala's first ever Olympic medalist in history.