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.

[1] He was elected a member of the Christchurch City Council from 1912 to 1917.

[4] 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.