John O'Brien 1938
John A. O'Brien 1961
Richard O'Brien 1920
Robert J. O'Brien 1961
Thomas P. O'Brien 1950
Angela Fabrizio O'Connor 1945
Neil J. O'Connor 1977
Thomas P. O'Connor 1943
Martin M. O'Donnell 1968
Owen C. O'Heir 1966
Joanne L. Trupia O'Hern 1981
Edgar B. O'Hora 1939
Paul J. O'Leary 1944
Henry F. O'Meara 1949
F R. Oakford 1949*
Clarence Oarr 1947
Walter W. Ochs F/S

Daniel W. Odell F/S
Carl J. Odenkirchen F/S
Albert Oetkin 1942*
Donald J. O'Hare 1950
Patrick O'Keefe F/S
Margaret Wilson Olcott 1937
Arthur J. Olivet 1947
Hiram F. Olmsted 1865
Clarence A. Olsen 1941
Milton C. Olson F/S
Kenneth G. Orner 1952
John F. Orser 1955, 1962
Watson Osborne 1848
John H. Ostrom 1860
Joseph H. Ouellette 1936
John C. Overbeck F/S
James J. Owens 1961
Theresa B. Fennessy Owens 1986
Maurice Ozer 1937