Korsakov, sometimes spelled as Korsakoff (Russian: Ко́рсаков), or Korsakova (feminine; Ко́рсакова), is a Russian surname. Notable people with the surname include:
Alexander Dondukov-Korsakov (1820–1893), Russian knyaz, cavalry general, Imperial Commissioner in Bulgaria
Andrey Korsakov (1916–2007), Russian and Ukrainian linguist and language philosopher
Alexander Rimsky-Korsakov (1753–1840), infantry general
Andrey Rimsky-Korsakov (1878–1940), Russian musicologist, son of the composer Nikolai Rimsky-Korsakov
Dmitry Korsakov (1843–1920), Russian historian
Nikolai Rimsky-Korsakov (1844–1908), Russian composer
Pyotr Korsakov (1790–1844), Russian writer
Semen Korsakov (1788–1853), Russian homeopath and inventor
Sergei Korsakoff (1854–1900), Russian neuropsychiatrist
Korsakoff's syndrome, a brain disease caused by chronic alcoholism named after Sergei Korsakoff
