Lambert McKenna S.J. (Irish: An tAthair Lámhbheartach Mac Cionnaith) (16 July 1870 – 27 December 1956) was a Jesuit priest and writer. He was born Andrew Joseph Lambert McKenna in Clontarf, and studied in Europe. He collected and edited religious and folk poetry in the Irish language. Working with the Irish Texts Society, he edited the famous Contention of the bards and many anthologies of Irish bardic poetry and historical works. He was an editor of the Irish Monthly and An Timire. He also served as principal of Belvedere College.