John Valentine (Jack) MacDonald (14 February 1880 – 17 August 1937) was a New Zealand-born Australian politician. MacDonald was born in Opotiki, New Zealand, the son of an Australian volunteer in the New Zealand Wars and veteran of the 1891 Australian shearers' strike. He completed his early education in New Zealand before his family migrated to New South Wales, whereafter he attended state schools. He spent time as a shearer in New South Wales and Victoria before returning to New Zealand and entering the printing trade. He began as a journeyman compositor, but shifted into journalism over time, working for the Wairoa Guardian and the Napier-based The Daily Telegraph before rising to become chief compositor and acting editor of the Gisborne Herald. He was also involved in the Typographical