Augustus Henry Moreton Macdonald of Largie (24 June 1804 – 14 February 1862), born Augustus Moreton, was a British Whig politician and writer.
Born Augustus Moreton, Macdonald was a younger son of Thomas Reynolds-Moreton, 1st Earl of Ducie, and Lady Frances, daughter of Henry Herbert, 1st Earl of Carnarvon.
Henry Reynolds-Moreton, 2nd Earl of Ducie, was his elder brother.
In 1836 he published the work Civilisation, or, a Brief Analysis of the Natural Laws that Regulate the Numbers and Condition of Mankind.
Macdonald survived her by eleven years and died in February 1862, aged 57.