Kazik is a diminutive of Slavic given name Kazimierz or Kazimir.

People with the name or nickname include:

Kazik Staszewski (born 1963), also known as Kazik, Polish singer and songwriter Kazik Radwanski (born 1985), Canadian film director and screenwriter Simcha Rotem (1924–2018), nom de guerre Kazik, a member of the Jewish underground in Warsaw during World War II Kazimierz J. Kasperek (1916–2008), nicknamed Kazik, Polish Navy veteran of World War II Wanda Gertz (1896–1958), Polish Legion female soldier in World War I under the name Kazik Zuchowicz

See also Gazik (disambiguation)