John Baldwin (16 August 1923 – 28 November 2007) was a British trade union leader.
Born in West Ham, Baldwin grew up in Basildon, where he was educated at Laindon Road Secondary School.
He left the Marines in 1948, and soon became a steel erector, joining the Constructional Engineering Union (CEU).
In 1957, he began working full-time for the union as an organiser, and in 1969 he was elected as its assistant general secretary.
In 1971, the CEU became the Construction Section of the Amalgamated Union of Engineering Workers (AUEW), retaining considerable autonomy.