Robert Sullivan

• Robert Sullivan (judoka), British Olympic judoka
• Robert Sullivan (poet), Māori writer from New Zealand
• Robert Austin Sullivan, American man executed in Florida
• Robert Baldwin Sullivan, Canadian lawyer, judge, and the second mayor of Toronto
• Robert J. Sullivan Jr., American politician
• Robert "Sully" Sullivan, American radio and television personality, entrepreneur, and musician
• Robert M. Sullivan, paleontologist
• Bob Sullivan (American football player), American football player
• Robbie Sullivan, fictional character in the television series Modern Family
• Bobby Sullivan, musician and activist
• Robert Joseph Sullivan (educator), Northern Irish educationalist, founder of Sullivan Upper School, author of English texts and dictionaries
• Robert Sullivan (reporter), associated with ''The New Yorker''