Baron Thomson of Fleet, of Northbridge in the City of Edinburgh, is a title in the Peerage of the United Kingdom. It was created in 1964 for the Canadian newspaper magnate Roy Thomson. He was succeeded in 1976 by his son, the second baron. The title is currently held by his grandson, the third baron, who succeeded his father in 2006.
The heir to this title is the present holder's son, the Hon. Benjamin Thomson (b. 2006)