Sergei Ivanov (born 1953), former Head of Kremlin Chief of Staff

Sergey Ivanov may also refer to:

• Sergey Ivanov (Russian historian) (born 1956), Russian historian and byzantinist
• Sergey Ivanov (American football) (born 1985), American footballer
• Sergey Ivanov (painter) (1864–1910), Russian painter
• Sergei Ivanov (cyclist) (born 1975), Russian professional bicycle racer
• Sergei Ivanov (footballer, born 1964), Russian football player and referee
• Sergei Ivanov (footballer, born 1980), Kyrgyzstan footballer with FC Irtysh (as of 2008)
• Sergey Ivanov (footballer, born 1984), Russian footballer formerly with FC Zenit St. Petersburg and FC Alania Vladikavkaz
• Sergei Ivanov (footballer, born 1997), Russian footballer
• Sergey Ivanov (referee) (born 1984), Russian international football referee
• Sergey Ivanov (runner) (born 1979), Russian runner
• Sergey Ivanov (politician, born 1969), Russian politician, a deputy of the 4th, 5th, 6th and 7th State Duma
• Sergey Ivanov (Saint Petersburg politician), Russian politician
• Sergei Ivanov (Estonian politician) (born 1958), Estonian politician
• Sergei Ivanov (mathematician) (born 1972), Russian mathematician
• Sergey Ivanov (chess player), Russian chess grandmaster, see Leningrad City Chess Championship