Liam Ó Dúgáin was an Irish scribe who flourished in the mid-19th century.
A native of Claregalway, Ó Dúgáin was a relation of Tomás Bacach Ó Dúgáin and Maolsheachlainn Ó Dúgáin, all of the same parish.
His scribal work consists of songs.