David W. O'Brien
Mark O'Connor 1945-
Desmond O'Grady, 1929-
Tony O'Leary
Donovan O'Malley
Mark O'Neill
Maurice O'Shea, 1897-1956
Barry Oakley
Odgers, George, 1916-2008 -- Archives
Sally Farrell Odgers, 1957-
Lorna Oliff
Ida Rentoul Outhwaite, 1888-1960
Outrider (literary journal)
Jan Owen 1940-