Lucius O'Brien
# Lucius O'Brien

Lucius O'Brien may refer to:

* Lucius O'Brien (died 1717)
* Sir Lucius O'Brien, 3rd Baronet (1731–1795), Member of the Parliament of Ireland
* Lucius O'Brien, 13th Baron Inchiquin (1800–1872), Irish politician and nobleman
* Lucius O'Brien, 15th Baron Inchiquin (1864–1929)
* Lucius Richard O'Brien (1832–1899), Canadian painter
* Lucius O'Brien (priest) (1842–1913), Dean of Limerick in the Church of Ireland
