Kosky is a surname. Notable people with the surname include:
Barrie Kosky (1967–), Australian theatre and opera director Lynne Kosky (1958–2014), Australian politician Paul Kosky, Australian music producer (see Killing Heidi)
See also Koski (surname) Corey Koskie (born 1973), Canadian baseball player Murray James Koskie (1929–2004), Canadian educator, lawyer, politician Scott Koskie (born 1971), Canadian volleyball player
Places Koski Duże, a village in Poland Kosky Peak, a mountain in the Welch Mountains, Palmer Land, Antarctica Koski Tl, a municipality in Finland