Kashin (masculine, {{lang-ru|Кашин}}) or Kashina (feminine, {{lang-ru|Кашинa}}) is a Russian surname. Notable people with the surname include:

• Anna Kashina, writer
• Daniil Kashin (1769–1841), Russian composer
• Kendo Kashin (born 1968), ring name of the Japanese wrestler Tokimitsu Ishizawa
• Nikolay Kashin, Russian physician and discoverer of the Kashin-Beck Disease
• Oleg Kashin (born 1980), Russian journalist and seaman

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