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 BulgariaAndrey Korsakov (1916–2007), Russian and Ukrainian linguist and language philosopherAlexander Rimsky-Korsakov (1753–1840), infantry generalAndrey Rimsky-Korsakov (1878–1940), Russian musicologist, son of the composer Nikolai Rimsky-KorsakovDmitry Korsakov (1843–1920), Russian historianNikolai Rimsky-Korsakov (1844–1908), Russian composerPyotr Korsakov (1790–1844), Russian writerSemen Korsakov (1788–1853), Russian homeopath and inventorSergei Korsakoff (1854–1900), Russian neuropsychiatristKorsakoff's syndrome, a brain disease caused by chronic alcoholism named after Sergei Korsakoff