Sir Alexander Charles George Leith, 1st Baronet (1741–1780) was a British soldier and politician who sat in the House of Commons between 1774 and 1780.
He married firstly Margaret Wren, a widow and daughter of Thomas Hay of Huntington.
[2] At the 1774 general election, Leith was returned unopposed as Member of Parliament for Tregony, which was in the gift of the Treasury.
Lord North, however, had him created baronet of Burgh St Peter, Norfolk on 21 November 1775.
[2] Leith died of excessive fatigue in Jamaica on 3 October 1780 while commanding an expedition to the Spanish Main.