The Lord O'Hagan | |
|---|---|
 Lord O'Hagan, c. 1868. | |
| Lord Chancellor of Ireland | |
| In office 1868–1874 | |
| Monarch | Victoria |
| Prime Minister | William Ewart Gladstone |
| Preceded by | Abraham Brewster |
| Succeeded by | In commission |
| In office 1880–1881 | |
| Monarch | Victoria |
| Prime Minister | William Ewart Gladstone |
| Preceded by | John Thomas Ball |
| Succeeded by | Hugh Law |
| Personal details | |
| Born | 29 May 1812 Belfast |
| Died | 1 February 1885 (aged 72) Hereford House, London |
| Nationality | British |
| Political party | Liberal |
Thomas O'Hagan, 1st Baron O'Hagan, KP, PC (Ire), QC (29 May 1812 – 1 February 1885), was an Irish lawyer and judge. He served as Lord Chancellor of Ireland from 1868 to 1874 and again from 1880 to 1881.