Robert O'Brien
# Robert O'Brien

Robert O'Brien may refer to:

* Robert O'Brien (artist) (born 1939), from British Hong Kong
* Robert O'Brien (canoeist) (born 1933), American sprint canoer
* Robert O'Brien (cricketer) (1869-1922), Australian cricketer
* Robert O'Brien (executive) (1907–1997), Hollywood businessman
* Robert O'Brien (racing driver) (1908–1987), American
* Robert O'Brien (RAF officer) (active 1990s), former Air Secretary
* Robert C. O'Brien (born 1966), US National Security Advisor
* Robert C. O'Brien (author) (1918–1973), US journalist and children's book author
* Bob O'Brien (born 1949), baseball player
* Bob O'Brien (basketball) (1927–2008), American basketball player
