Archibald Menzies (/ˈmɪŋɪs/ MING-iss; 15 March 1754 – 15 February 1842) was a Scottish surgeon, botanist and naturalist.
Menzies was born at Easter Stix (or Styx) in the parish of Weem, in Perthshire. While working with his elder brother William at the Royal Botanic Gardens, he drew the attention of Dr John Hope, professor of botany at Edinburgh University, who encouraged him to study medicine there. Having qualified as a surgeon, Menzies served as assistant to a doctor in Caernarvon, then joined the Royal Navy as assistant surgeon on HMS Nonsuch. Present at Battle of the Saintes (12 April 1782), in peacetime Menzies served on Halifax Station in Nova Scotia.
In 1786 Menzies was appointed surgeon on board the Prince of Wales (Captain James Colnett), on a fur-trading voyage round Cape Horn to the northern Pacific. This ship, in company of Princess Royal (Captain Duncan), visited North America, China and Hawaii (the Sandwich Isles) several times; Menzies collected a number of new plants on this voyage, and also ensured that none of the crew died of illness. Menzies returned to Great Britain in 1789. He was elected a fellow of the Linnean Society in 1790.