Gradin or Gradín is the surname of the following people

• Anita Gradin (born 1933), Swedish politician
• Carles Poch-Gradin (born 1982), Spanish tennis player
• Isabelino Gradín (1897–1944), Uruguayan football player and athlete
• Luis Gradín, Argentine rugby union player and coach
• Peter Gradin (born 1958), Swedish ice hockey player
• Thomas Gradin (born 1956), Swedish ice hockey scout and former player