Theodore I
# Theodore I

Theodore I may refer to:

* Patriarch Theodore I of Alexandria, Greek Patriarch of Alexandria (607–609)
* Pope Theodore I (died 649)
* Theodore I Calliopas, Exarch of Ravenna (643–645 and 653 – c. 666)
* Patriarch Theodore I of Constantinople (ruled 677–679)
* Theodore I Laskaris, Emperor of Nicaea (1204–1221 or 1205–1222)
* Theodore II Laskaris, Emperor of Nicaea, 1254–1258
* Teodor I Muzaka, Albanian despot
* Theodore I Palaiologos, Despot of the Morea in 1383-1407
* Tewodros I of Ethiopia, Emperor of Ethiopia (1413–1414), sometimes known as Theodore I
* Theodore I of Corsica, King of Corsica (1736)
