Attorney General O'Brien may refer to:
- Denis O'Brien (politician) (1837–1909), Attorney General of New York
- Ignatius O'Brien, 1st Baron Shandon (1857–1930), Attorney General for Ireland
- Peter O'Brien, 1st Baron O'Brien (1842–1914), Attorney General for Ireland
See also edit
This disambiguation page lists articles associated with the title Attorney General O'Brien.
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