Thomas "Tom" Williamson, Baron Williamson CBE (2 September 1897 – 27 February 1983) was a trade unionist and Labour Party politician in the United Kingdom.
He was General Secretary of the National Union of General and Municipal Workers from 1946 to 1961, and President of the Trades Union Congress from 1957 to 1958.
At the 1945 general election, he was elected as Member of Parliament for the Brigg constituency in Lincolnshire. He resigned his seat in 1948, and the resulting by-election was won by Labour's Lance Mallalieu.
Williamson was made a life peer on 15 May 1962, as Baron Williamson, of Eccleston in the Borough of St. Helens in the County Palatine of Lancaster. He died in 1983, aged 85.
| Parliament of the United Kingdom | ||
|---|---|---|
| Preceded by David Quibell |
Member of Parliament for Brigg 1945–1948 |
Succeeded by Lance Mallalieu |
| Political offices | ||
| Preceded by Charles Dukes |
General Secretary of the National Union of General and Municipal Workers 1946 - 61 |
Succeeded by Jack Cooper |
| Preceded by Wilfred Blackwell Beard |
President of the Trades Union Congress 1957 - 58 |
Succeeded by Tom Yates |