Korff is a last name shared by the following people:
- Arnold Korff (1870–1944), Hollywood actor and director
- André Korff (born 1973), German bicycle racer
- Baruch Korff, (1914–1995), Jewish community activist
- Hans-Peter Korff (born 1942), German actor
- Johann Albrecht von Korff (1697–1766), diplomat, president of the St. Petersburg Academy of Sciences
- Michael Von Korff (born 1949), American epidemiologist
- Serge Alexander Korff [fi] was an assistant of Governor-General of Finland
- Serge Alexander Korff (1906-1989), American physicist
- Werner Korff (1911–1999), German Olympic ice hockey player
- Yitzhak Aharon Korff, grand rabbi, diplomat and consultant in international law and business, entrepreneur