Terence O'Brien
Terence or Terrence O'Brien may refer to:
- Terence O'Brien (bishop), Irish Roman Catholic bishop of Emly
- Terence O'Brien (British [Army officer, died 1865)], British Army officer and acting governor of Ceylon
- Sir Terence O'Brien (colonial administrator), British Army officer and governor of Newfoundland, 1889–1895, son of the above
- Terence O'Brien (actor), Irish-born British actor
- Terence O'Brien (rower), English Olympic rower
- Terence O'Brien (British diplomat), British ambassador to Nepal, 1970–1974, Burma, 1974–1978, and Indonesia, 1978–1981
- Terence O'Brien (New Zealand diplomat), New Zealand ambassador to the United Nations, 1980–1983, 1990–1993, and the European Community, 1983–1986
- Terrence L. O'Brien, United States federal judge
- Terrence O'Brien (director), American founder and director of the Hudson Valley Shakespeare Festival