Sir Archibald Macdonald, 1st Baronet (13 July 1747 – 18 May 1826) was a Scottish-born English lawyer, judge and politician.

[2] Macdonald was Member of Parliament for Hindon in Wiltshire, from 1777 until 1780, and then for Newcastle-under-Lyme, from 1780 to 1792, a seat where his father-in-law had a strong influence.

He served as the prosecutor in Thomas Paine's criminal libel trial over the publication of Rights of Man in 1792.

He was promoted as Lord Chief Baron of the Exchequer in 1793, and served in this post until he retired in 1813, with failing eyesight.

[6] On 26 November 1777, Macdonald married Lady Louisa Leveson-Gower (1757–1827), daughter of Granville Leveson-Gower, 1st Marquess of Stafford (at the time called by the courtesy title Earl Gower), then Lord President of the Council,[7] and the former Lady Louisa Egerton (a daughter of the 1st Duke of Bridgwater).