Shabdar Osyp (Mari: èðñôðÃÂàÃÂÃÂÃÂÃÂÿ, 27 March 1898 â 11 November 1937) was a Mari author.
He was born as Iosif Arkhipovich Shabdarov () in the village of Malaya Luzhala in Mari El.
He started writing poetry in 1918. He studied at a pedagogical college in Kazan.
Like most of the Mari intelligentsia at the time, he became a victim of stalinism and was executed in Yoshkar-Ola on 11 November 1937. He was rehabilitated posthumously.