Riss or RISS may refer to:

• Riss (cartoonist), French cartoonist, author and publisher Laurent Sourisseau (born 1966), majority owner of the satirical newspaper Charlie Hebdo
• Dan Riss (1910–1970), American actor
• Erik Riss (born 1995), German speedway and grasstrack rider, son of Gerd and brother of Mark Riss
• Gerd Riss (born 1965), German former motorcycle speedway rider, father of Erik and Mark Riss
• Hermine Riss (1903–1980), Austrian honored as Righteous among the Nations for saving Jews from the Holocaust
• Juan Carlos Riss (born 1955), Bolivian politician and economist
• Mark Riss (born 1994), German speedway racer, son of Gerd and brother of Erik Riss
• Iris or Riss Long, founder and member of The Lana Sisters British vocal group (1958–1961)

• Riss (river), Germany
• Riss Lake, Missouri, United States, a reservoir

• Regional Information Sharing Systems, an American information-sharing program for law enforcement

• Riss glaciation
• Ris (disambiguation)

This disambiguation page lists articles associated with the title Riss.
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