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

• All pages with titles containing Kosir

This page lists people with the surname Košir.
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