Tikhonov, sometimes spelled as Tychonoff (), or Tikhonova (feminine; ????????) is a Russian last name and may refer to:

People

• Aleksandr Tikhonov, a Russian biathlon athlete
• Alexei Tikhonov, a Russian figure skater
• Andrey Nikolayevich Tychonoff, a Russian mathematician
• Andrey Vasilyevich Tikhonov, a Russian football player
• Konstantin Tikhonov, a Soviet army officer and Hero of the Soviet Union
• Mikhail Tikhonov, a Soviet soldier and Hero of the Soviet Union
• Nikolay Alexandrovich Tikhonov, a former Premier of the Soviet Union
• Nikolay Semenovich Tikhonov, a Russian writer, a member of Serapion Brothers literatury group
• Vasily Tikhonov (pilot), a Soviet pilot and Hero of the Soviet Union
• Vasily Tikhonov, a Soviet soldier and Hero of the Soviet Union
• Vasily Ivanovich Tikhonov, a Soviet soldier and Hero of the Soviet Union
• Viktor Pavlovich Tikhonov, a Soviet pilot and Hero of the Soviet Union
• Viktor Vasilyevich Tikhonov, a former coach for the Soviet national ice hockey team
• Vladimir Tikhonov, a Russian politician
• Vyacheslav Vasilyevich Tikhonov, a Soviet actor famous for Standartenführer Stirlitz role

Mathematics

• Tychonoff spaces, completely regular topological spaces
• Tychonoff's theorem, a result on topological spaces
• the Tychonoff separation axioms in topology
• Tikhonov distribution is a random variable distribution

Other

• Tikhonov regularization, a method of regularization of ill-posed problems
• Tikhonov (village), a village (khutor) in the Republic of Adygea, Russia

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