Ponnappa is a surname. Notable people with the surname include:
Real people
Ashwini Ponnappa (born 1989), Indian badminton player Bansi Ponnappa, Indian army officer N. Ponnappa, Indian freelance cartoonist Rajshri Ponnappa, Indian actress Veena Ponnappa, actress in 2022 Indian film Vedha Yasmin Ponnappa, Indian model
Mythological
Kalyatanda Ponnappa, 17th-century warrior god