Major General Lachlan Macquarie CB
5th Governor of New South Wales
In office 1 January 1810 – 30 November 1821
Monarch	George III
Preceded by	William Bligh
Succeeded by	Thomas Brisbane
Personal details
Born	(31 January 1762-Expression error: Unrecognized punctuation character "{".-{{{day}}})Expression error: Unrecognized punctuation character "{"., Expression error: Unrecognized word "january".Expression error: Unrecognized word "january". Ulva, Inner Hebrides, Scotland
Died	1 July 1824(1824-07-01) (aged 62) London, England
Spouse(s)	Jane Jarvis (m. 1792–1796) Elizabeth Campbell (1807–1835)
Military service
Allegiance	United Kingdom
Branch/service	British Army
Rank	Major General
Commands	73rd (Perthshire) Regiment of Foot
Battles/wars	American Revolutionary War Napoleonic Wars Australian Frontier Wars
Awards	Companion of the Order of the Bath

Major-General Lachlan Macquaire CB (31 January 1762 – 1 July 1824) was a British military officer and the fifth Governor of New South Wales from 1810 to 1821.

Macquarie had a leading role in the social, economic and architectural development of Australia. Historians say he changed New South Wales from a penal colony to a free settlement. This was very important in making the future of Australian society.