Riesz may refer to:
Frigyes Riesz (1880–1956), Hungarian mathematician Helene Scheu-Riesz (1880–1970), Austrian women's rights activist, writer and publisher Marcel Riesz (1886–1969), Hungarian and Swedish mathematician, younger brother of Frigyes Riesz
See also Riesz, the fictional Amazon warrior and princess of Rolante— one of the six playable characters in the video game Seiken Densetsu 3 Mademoiselle Reisz, a character in Kate Chopin's novel The Awakening Related surnames Riess, German surname Reisz, surname Ries (disambiguation), derived from the Arabic word rizma