Thomas Williamson, Baron Williamson, CBE, JP (2 September 1897 – 27 February 1983) was a British trade unionist and Labour Party politician. Williamson was born in St. Helens, Lancashire. His father was a glassblower, and Tom began his career working in the office of his father's union, the National Amalgamated Union of Labour. He became a full-time union delegate, and in 1924, when it became part of the National Union of General and Municipal Workers (NUGMW), he was appointed as a district secretary. He became interested in politics at age 9, when his father took him to see Tom Mann speak. During the First World War, he served with the Royal Engineers.