David Macbeth Moir (5 January 1798 – 6 July 1851) was a Scottish physician and writer.
At the age of 13 he was apprenticed to the medical practitioner Dr Stewart, studying with him for four years while also attending classes at the University of Edinburgh, from where he graduated in 1816.
His life is featured in the book, The "Blackwood" Group by Sir George Douglas, Edinburgh: Oliphant, Anderson & Ferrier, 1897.
Among his publications were the famous Life of Mansie Wauch, Tailor (1828), which shows his gifts as a humorist, Outlines of the Ancient History of Medicine (1831), and Sketch of the Poetical Literature of the Past Half Century (1851).
In June 1829 he married Catherine Elizabeth Bell at Carham Church, Northumberland, and together they had 11 children.