Taddei is an Italian surname. Notable people with the surname include:
Alessandro De Taddei (born 1971), Italian speed skater Claudio Taddei (1966–2019), Uruguayan-Swiss singer-songwriter and painter Frédéric Taddeï (born 1961), French journalist and television and radio host Giuseppe Taddei (1916–2010), Italian baritone Guadalupe Taddei (born 1963), Mexican civil servant Marc Taddei, conductor based in New Zealand Marco Taddei Né (born 1983), Ivorian football midfielder Mario Taddei (born 1972), Italian historian of science Max Taddei (born 1991), Italian professional footballer Nazareno Taddei (1920–2006), Italian Jesuit priest, linguist, author and film critic, after whom the Nazareno Taddei Award of the Venice International Film Festival is named Paolino Taddei (1860–1925), Italian politician Patrizia Taddei (born 1948), Sammarinese artist Pier Paolo Taddei (born 1949), Sammarinese sports shooter Riccardo Taddei (born 1980), Italian association footballer Rodrigo Taddei (born 1980), Brazilian footballer Rosa Taddei (1799–1869), Italian actress and poet Samuele Taddei (born 2003). Italian rugby player Taddeo Taddei (1470–1528), Florentine humanist and patron, after whom the Taddei Tondo is named Valdir Antônio Taddei (died 2004), Brazilian zoologist and expert on Neotropical bats
See also Taddei Tondo, a relief sculpture by Michelangelo