| Honorific-Prefix: | The Honourable |
| Jack McCullough | |
| Order: | Member of the Legislative Council |
| Term Start: | 9 March 1936 |
| Term End: | 29 July 1947 |
| Appointed: | Michael Joseph Savage |
| Birth Name: | John Alexander McCullough |
| Birth Date: | 17 January 1860 |
| Birth Place: | Belfast, Ireland |
| Death Place: | Christchurch, New Zealand |
| Party: | Labour Party |
John Alexander McCullough (17 January 1860 - 29 July 1947) was a New Zealand tinsmith, trade unionist and political activist.
He was born in Belfast, County Antrim, Ireland on 17 January 1860.
He was elected a member of the Christchurch City Council from 1912 to 1917.[1]
The Riccarton electorate was contested by three candidates in the . George Witty, the incumbent since the,[2] was successful, with Bert Kyle coming second and McCullough coming third.[3] The First Labour Government appointed McCullough to the New Zealand Legislative Council on 9 March 1936. At the end of his seven-year term, he was reappointed on 9 March 1943. He remained a member until his death on 29 July 1947.[4]
He died in Christchurch on 29 July 1947 aged 87.
The 1908 Blackball miners' strike
. New Zealand Parliamentary Record, 1840–1949 . Guy Scholefield . 3rd . First ed. published 1913 . 1950 . Govt. Printer . Wellington . 149.