Pilin Tachakittiranan (Thai: ไพลิน เตชะกฤตธีระนันท์; born June 14, 1983) is a Thai former swimmer, who specialized in freestyle and butterfly events. She is a two-time Olympian (2000 and 2004) and a multiple-time age-group record holder in all freestyle distances (except 1500 m). Regarded as Thailand's top female swimmer, she has won a total of five gold medals at the Southeast Asian Games (2003 and 2005). At the 2003 Southeast Asian Games in Hanoi, Vietnam, Tachakittiranan dominated the pool for Thailand by claiming a total of three gold medals in the 200, 400, and 800 m freestyle.