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)
- 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
- Feodor I of Russia, Tsar of Russia, 1584–1598
- Theodore I of Corsica, King of Corsica (1736)
This disambiguation page lists articles about people with the same name.
If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.
If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.