Alfred Miller Mundy (9 January 1809 – 29 March 1877) was an aristocratic English military officer in colonial New South Wales who after leaving the army served in the Legislative Council of South Australia, from 15 June 1843 to 14 May 1849.
Mundy was the third son of Edward Miller Mundy (18 October 1750 – 18 October 1822) of Shipley Hall, Derbyshire, England, a Tory politician who represented the seat of South Derbyshire.
He enlisted in the army and was in Sydney in November 1827 when he was promoted to Second Lieutenant, 94th Regiment of Foot, later promoted to Lieutenant, 21st Regiment of Foot. He was appointed Magistrate in Tasmania in March 1835. and Justice of the Peace in 1837. He resigned his commission in 1839, but was later commonly referred to as "Lieutenant Mundy".
On 11 July 1839 Mundy, John Bourke and Joseph Hawdon set out from Melbourne for Adelaide, Mundy and Bourke on a light tandem and Hawdon on horseback, following the route taken by Charles Bonney via Portland Bay and the Glenelg River. They arrived in Adelaide exactly a month later, and estimated it could easily be done in half that time.
He joined with Edward Bate Scott and Edward John Eyre, who had a scheme to purchase and transport livestock from Adelaide to the Swan River Colony (now Perth), aboard chartered ships as far as King George's Sound (then the only deepwater harbor in Western Australia) and then drive them overland to Perth. On 30 January 1840 they loaded some stock onto the schooner Minerva and a few days later the remainder onto the barque Cleveland. Eyre sailed aboard Minerva while Mundy was aboard the Cleveland. The stock consisted of 1700 sheep, which included over 1000 ewes and 450 lambs, 6 horses and 100 cattle. They achieved good prices in Perth, and would have made a tidy profit except many sheep and cattle died on the track in Western Australia, ascribed to their eating poisonous plants. On 3 April 1840 Eyre and Mundy were elected honorary members of the W.A. Agricultural Society. They arrived back in Adelaide aboard Minerva in May 1840.