Robert O'Brien

Sportspeople

• Robert O'Brien (cricketer), Australian cricketer
• Robert O'Brien (racing driver), American racing driver
• Bob O'Brien (basketball), American basketball player
• Robert O'Brien (canoeist), American sprint canoer
• Bob O'Brien (baseball), baseball player

Others

• Robert J. O'Brien, American real estate developer, politician and philanthropist
• Robert O'Brien (executive), American businessman
• Robert C. O'Brien (author), American journalist and children's book author
• Robert O'Brien (artist), British Hong Kong artist
• Robert O'Brien (RAF officer), former US Air Secretary
• Robert C. O'Brien, US National Security Advisor