Kosin may refer to:
Places Czech Republic Košín, a municipality and village in the Czech Republic
Poland Kosin, Łódź Voivodeship (central Poland) Kosin, Lublin Voivodeship (east Poland) Kosin, Lubusz Voivodeship (west Poland) Kosin, Drawsko County in West Pomeranian Voivodeship (north-west Poland) Kosin, Pyrzyce County in West Pomeranian Voivodeship (north-west Poland)
People Kosin Hembut (born 1982), Thai footballer Phil Kosin (1950–2009), American journalist Yuri Kosin (1948–2022), Ukrainian photographer
Other uses Kosin University, a university in Busan, South Korea