| John Blakiston-Houston | |
| Office: | Member of Parliament for North Down |
| Term Start: | 7 December 1898 |
| Term End: | 24 October 1900 |
| Predecessor: | Thomas Waring |
| Successor: | Thomas Lorimer Corbett |
| Birth Date: | 11 September 1829 |
| Party: | Irish Unionist |
| Nationality: | British |
| Spouse: | Marian Streatfield |
| Children: | 12 |
John Blakiston-Houston DL JP (11 September 1829 – 27 February 1920) was an Irish Member of Parliament.
Blakiston-Houston was the son of Richard Bayly Blakiston-Houston (d. 1857), of Orangefield, County Down, and his wife Mary Isabella Houston. He was a grandson of Sir Matthew Blakiston, 2nd Baronet. He married Marian Gertrude Streatfield, of Sussex (d. 1890); the couple had twelve children.[1]
John Blakiston-Houston was High Sheriff (1860) and Deputy Lieutenant (D.L.) of County Down. He also held the office of Vice-Lord-Lieutenant of County Down. Between 1898 and 1900 he was the Irish Unionist Member of parliament for North Down at Westminster.[1]