William O'Brien was an Irish nationalist, journalist, agrarian agitator, social revolutionary, politician, party leader, newspaper publisher, author and Member of Parliament (MP) in the House of Commons of the United Kingdom of Great Britain and Ireland. He was particularly associated with the campaigns for land reform in Ireland during the late 19th and early 20th centuries as well as his conciliatory approach to attaining Irish Home Rule.
- Occupation
- journalist, politician, writer
- Position held
- member of the 30th Parliament of the United Kingdom, member of the 29th Parliament of the United Kingdom, member of the 28th Parliament of the United Kingdom, member of the 27th Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland, Irish Free State
