Eoghan Carrach Ó Siadhail (fl.
c. 1500–1550) was a poet from County Donegal who wrote in Irish.
Eoghan Carrach was a member of the Ó Siadhail family of Tír Chonaill (now County Donegal).
Under the patronage of Niall Connallach (Niall Óg Ó Neill, died 1544), he made a copy of Beatha Cholm Cille.
It now exists as University College Dublin, MS A.