Attanasio is a surname. Notable people with the surname include:
Antonio Attanasio (1950–1982), Italian swimmer
A. A. Attanasio, science fiction writer
Dino Attanasio, comics artist
Mark Attanasio, investment banker and owner of the Milwaukee Brewers
Orazio Attanasio, Italian economist
Paul Attanasio, screenwriter and television producer
Gianluca John Attanasio, composer, singer-songwriter and music producer