Robert McGregor
captain, Her Majesty's Armed Forces; affiant in the Hostages Trial
- Occupation: farmer (work location: Scotland); military officer
- Participant in: Hostages Trial (date: 1947-10-25; role: affiant)
- Significant person: Guenther Kleykamp; Hellmuth Felmy
- Military branch: British Armed Forces (date: 1944-01-01; military rank: captain; work location: Greece)