Badal Roy (Bengali: বাদল রায়; born Amarendra Roy Chowdhury; 16 October 1939 – 18 January 2022) was an Indian tabla player, percussionist, and recording artist known for his work in jazz, world music, and experimental music.

Roy was born Amarendra Roy Chowdhury on 16 October 1939, into a Hindu family in a predominantly Muslim eastern Bengal region in Comilla, British India (which later became East Pakistan, then Bangladesh). His mother, Sova Rani Roy Chowdhury, was a homemaker, while his father, Satyenda Nath Roy Chowdhury was a government official in Eastern Pakistan. The name Badal (meaning "rain," "cloud", or "thunder" in the Bengali language), was given to him by his grandfather after he began crying in the rain as a toddler. He spoke the Bengali, English, Hindi, and Urdu languages.

He was introduced to music, in particular the percussion instrument Tabla, by his uncle. An early inspiration for Roy was American popular music, and he particularly enjoyed the music of artists such as Elvis Presley, Pat Boone, and Nat King Cole. His first exposure to jazz came when he saw a concert by Duke Ellington in Karachi, West Pakistan in 1963.

Roy received a master's degree in statistics. He came to New York City in 1968 to work on a PhD with only eight dollars in his pocket, he began working as a busboy and waiter in various Indian restaurants in the New York area, including Pak Indian Curry House, Taste of India and Raga. He later settled in East Brunswick Township, New Jersey. He later received lessons from Alla Rakha, a tabla player who performed with the sitar player Ravi Shankar and was Zakir Hussain's father.

Roy married Geeta Vashi in 1974. The couple had a son and lived in Wilmington, Delaware. Roy died from COVID-19 in Wilmington, on 18 January 2022, at the age of 82.

When Roy moved to New York, he worked as a waiter in Indian restaurants in the region. At weekends, he performed as a tabla artist accompanying a sitar player at A Taste of India, an Indian restaurant in Greenwich Village in New York. Here, he was spotted by John McLaughlin who asked Roy to accompany him in jam sessions and later to contribute to the album My Goal's Beyond (1971). The album was considered a landmark one in Indian-themed jazz.

Steve Gorn spotted him in a Manhattan restaurant called Raga, eventually attracting the attention of Miles Davis. Davis invited Roy to join his group, and he recorded on Davis's albums On the Corner (1972), Big Fun (1969–72; released 1974), and Get Up with It (1970–74). Roy subsequently performed and recorded with many leading jazz musicians, including Davis, Dave Liebman, Pharoah Sanders, John McLaughlin, Herbie Hancock, Herbie Mann, Pat Metheny, Lester Bowie, Airto Moreira, Charlie Haden, Purna Das Baul, and Ornette Coleman (playing in Coleman's electric band Prime Time). In the 1990s Roy began performing with the Brazilian guitar duo Duofel. He has also collaborated with Ken Wessel and Stomu Takeishi in a fusion trio named Alankar. They currently have one album entitled Daybreak.

Roy has appeared and offered workshops at RhythmFest, the Starwood Festival, and at the SpiritDrum Festival, a special tribute to the late Babatunde Olatunji (co-sponsored by ACE and Musart) with Muruga Booker, Jim Donovan of Rusted Root, Halim El-Dabh, Richie "Shakin'" Nagan, Jeff Rosenbaum and Sikiru Adepoju, among others. He often played with Muruga Booker in the Global Village Ceremonial Band, and with Michael Wolff & Impure Thoughts. In 2004, Roy worked with Richie Havens on the album The Grace of the Sun. In the first half of 2006, Roy travelled to Japan to appear in a tribute for David Baker, his recently deceased recording engineer and friend.