Guglielmi (surname)

Guglielmi is an Italian surname that may refer to
 * Alejandro Guglielmi (born 1936), Argentine equestrian
 * Alighiero Guglielmi (1912−1988), Italian racewalker
 * Éric Guglielmi (1970–2021), French photographer, editor, and photojournalist
 * Gary Guglielmi (born 1958), Australian speedway hider
 * Gregorio Guglielmi (1714−1773), Italian-born fresco painter who worked primarily in Germany
 * Louis Guglielmi (1916–1991), Spanish-born French musician
 * Marco Guglielmi (1926–2005), Italian actor, screenwriter and author
 * Massimo Guglielmi (born 1970), Italian lightweight rower
 * Monica Guglielmi (born 1974), Italian former professional tennis player
 * Noel Gugliemi, American actor
 * O. Louis Guglielmi (1906–1956), American artist
 * Pietro Alessandro Guglielmi (1728–1804), Italian opera composer (father of Pietro Carlo Guglielmi)
 * Pietro Carlo Guglielmi (1772–1817), Italian opera composer
 * Ralph Guglielmi (1933–2017), American football quarterback
 * Simon Guglielmi (born 1997), French cyclist
 * Rodolfo Alfonso Raffaello Piero Filiberto Guglielmi (1895–1926), known as Rudolph Valentino, Italian actor based in the US