Vasallo or Vassallo is a surname of Spanish and Italian origin. Notable people with the surname include:
Aldenay Vasallo (born 1977), Cuban hammer thrower Brigitte Vasallo (born 1973), Spanish writer Carlos Vasallo (born 1950), Spanish businessman and audiovisual producer Nicholas Vasallo (born 1979), American composer Norma Vasallo Barrueta, sometimes known as Norma Vasallo, Cuban feminist researcher and academic
See also Palacio Vasallo, government building in Argentina VasalloVision, Spanish-language television network in the US.