Kulagin () is a Russian masculine surname, its feminine counterpart is Kulagina. It may refer to:
Aleksandr Kulagin (born 1954), Russian rower Andrey Kulagin Boris Kulagin (1924–1988), Russian ice hockey player Dmitry Kulagin (born 1992), Russian basketball player Leonid Kulagin (born 1940), Russian actor, film director and screenwriter Mikhail Kulagin Nina Kulagina (1926–1990), Russian woman who claimed to have psychic powers Valentina Kulagina (1902–1987), Russian painter and graphical designer