Nnadi is a surname. Notable people with the surname include:

Chioma Nnadi (born 1980 or 1981), British fashion editor Derrick Nnadi (born 1996), American football player Iheoma Nnadi (born 1995), Nigerian beauty pageant titleholder Tochukwu Nnadi (born 2003), Nigerian footballer

See also Nnamdi