Guðmundur (Icelandic pronunciation: [ˈkvʏðmʏntʏr̥]), sometimes rendered as Gudmundur, is an Icelandic male first name, sometimes shortened to Gummi or Gvendur.

The Icelandic surname Guðmundsson is a patronymic surname meaning son of Guðmundur. Guðmundsdóttir is a patronymic surname meaning daughter of Guðmundur.

Guðmundur may refer to: