Aczél is a Hungarian surname meaning "steel". Notable people with the surname include:
Amir Aczel (1950–2015), Israeli-born American mathematics writer of Hungarian origin; author of books on mathematicians and the history of mathematics
György Aczél (1917–1991), Hungarian communist politician
János Aczél (died 1523), Hungarian poet
János Aczél (mathematician) (born 1924), Hungarian-Canadian mathematician
József Aczél (1900–1945), Hungarian footballer
Peter Aczel, British mathematician
Steve Aczel (born 1954), Hungarian/Australian boxer of the 1980s, '90s and 2000s
Zoltán Aczél (born 1967), Hungarian footballer
