Košir

Košir, sometimes Germanized Koschier, is a Slovenian surname. Notable people with the surname include:


 * Dejan Košir (born 1973), Slovenian snowboarder
 * Jure Košir (born 1972), Slovenian alpine skier
 * Lovrenc Košir (1804–1879), Austrian civil servant
 * Manca Košir (born 1948), Slovenian journalist and actress
 * Nick Kosir, American meteorologist
 * Žan Košir (born 1984), Slovenian snowboarder