John Campbell

John Campbell (? – 2 January 1937) was a labour movement activist in Northern Ireland who served as secretary of the Northern Ireland Labour Party (NILP).

Born into a Catholic family, Campbell worked in the sheet-metal department of a shipyard in Belfast and was active in the National Union of Sheet Metal Workers and Braziers, chairing its Belfast branch from the mid-1910s. Through this, he was prominent on Belfast Trades Council, serving as its vice-chairman. He became involved in the National Council for Civil Liberties' 1930s protests against the Civil Authorities (Special Powers) Act (Northern Ireland) 1922 and, as a result, was sacked from his job at the shipyard.