Eudemus I Diasamidze (Georgian: ევდემოზ I დიასამიძე, Evdemoz I Diasamidze; died 1642) was a Georgian churchman serving as Catholicos Patriarch of Georgia from 1632 until his death in 1642. His demise was occasioned by his involvement in a plot against the Muslim king of Kartli, Rostom-Khan, who had him arrested and put to death in prison. He was buried in the Anchiskhati church in Tbilisi. Eudemus was canonized by the Georgian Orthodox Church as a "holy hieromartyr", his feast day marked on 17 October [O.S. 4 October].