Nicholas "Nico" Thomas (born 10 June 1966) was an Indonesian professional boxer.
Thomas is the 12th of 16 children of Julianus Thomas and Helena Thomas. Nico Thomas is father of 3 sons Devitho, Danitho and Marcellino, from his wife Farida Ade Yani-Thomas. He was trained by his late elder brother, Charles Thomas, a former Indonesian amateur national champion when Nico was only 5 years old.
Thomas became the IBF Strawweight champion after defeating Thai Samuth Sithnaruepol in Jakarta, Indonesia on 17 June 1989. Thomas, known as the second man of Indonesia to win a world boxing title, after Ellyas Pical, lost his title in his first defence against Eric Chavez of the Philippines. He also faced Andy Tabanas, among others.