Grosz or Grósz is a surname of several possible origins.
"Grosz" is a Polish-language surname originally used by Poles and Polish Jews derived either from the nickname from Polish "grosz", a coin, 1/100 of Polish zloty or from Polish spelling of German Groß, meaning "large".
Grósz is a Hungarian language spelling of "Groß".
[1] Notable people with this surname include: