Koslov is a surname. Notable people with the surname include:
Alex Koslov (born 1984), professional wrestler Nikolay Koslov, cross country skier Vladimir Koslov (born 1958), bobsledder Tamar Koslov, Voiced Prunella Deegan in Arthur
Fictional characters: Vasili Ivanovich Koslov is the first playable protagonist in Call of Duty 2 Rabbi Joseph Koslov, from Babylon 5 Koslov, from Zootopia
See also Koslov's pika, a mammal in the family Ochotonidae Kozlov, a surname Kozlovski, a surname