Denis Collins

• Denis Collins (business ethicist), American teacher of business ethics
• Denis Collins (footballer), Australian rules footballer of the 1970s
• Denis Collins (journalist), American journalist and juror in the trial of Scooter Libby
• Denis Collins (politician), Australian politician from the Northern Territory
• Dennis J. Collins, American politician and lawyer
• Dennis P. Collins, American politician; former mayor of Bayonne, New Jersey