Peter O'Reilly

• Peter O'Reilly (civil servant), settler and official in the Colony of British Columbia
• Peter Joseph O'Reilly, Irish-born Catholic bishop in the United States
• Peter O'Reilly (hurler), Irish hurler
• Peter O'Reilly (Gaelic footballer), Irish Gaelic football manager, coach and player
• Peter O'Reilly (cricketer), Irish sports journalist and former cricketer