Portrait of Henry Addington is an 1803 portrait painting by the English artist William Beechey depicting the then British prime minister Henry Addington.

Following the breakdown over the Peace of Amiens he led Britain in the early Napoleonic Wars and was faced with a threatened French invasion.

In 1805, Addington rejoined the government and was made Viscount Sidmouth.

[2] Beechey, a member of the Royal Academy, was a prominent portraitist of the Regency era.

Today the work is in the collection of the National Portrait Gallery, London, having been acquired in 1985.