Gramajo is a surname. Notable people with the surname include:
Arturo Gramajo (1897–1957), Argentine bobsledder and food inventor César Augusto Blanco Gramajo (born 1959), Guatemalan chess player Eduardo Edilio Costa Gramajo (born 1977), Argentine judoka Héctor Gramajo (1940–2004), Guatemalan general Henry Gramajo (born 1970), Uruguayan equestrian Horacio Gramajo (1900–1943), Argentine bobsledder Roberto Gramajo (1947–2023), Argentine football forward
See also
Revuelto Gramajo, Argentine dish consisting of potatoes, ham, and eggs