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Thinker or The Thinker may refer to:
- The Thinker, a bronze sculpture by Auguste Rodin
- The Thinker: Portrait of Louis N. Kenton, a 1900 oil painting by Thomas Eakins
- Thinker (DC Comics), five fictional, telepathic supervillains
- The Thinker?, a 1981 Indian environmental short animated film by A. R. Sen, winner of the National Film Award for Best Non-Feature Animation Film
- The Thinker (horse) (1978–1991), an Irish–British racehorse
- Ulmus parvifolia 'The Thinker', a Chinese elm cultivar
- Karditsa Thinker, Neolithic clay figurine at the National Archaeological Museum of Athens
- Thinker from Yehud, Middle Bronze Age II Palestine clay figurine at the Israel Museum
- The Thinker and the Sitting Woman, ancient Neolithic figurine is believed to date back to the Hamangia culture