Ernest Macartney de Burgh (English: /dəˈbɜːr/ də-BUR; 18 January[1] 1863 – 3 April 1929[2]) was an Irish-born Australian civil engineer, chief-engineer for water supply and sewerage in New South Wales.

In 1903 de Burgh became acting principal assistant engineer of water supply and sewerage, a year later visited Europe to study dam construction and water supply, and after his return did important work in connection with the Burrinjuck Dam and Murrumbidgee irrigation scheme.

He designed and supervised the construction of the great reservoirs for the Sydney water supply at Cataract, Cordeaux, Avon, and Nepean, for the Chichester scheme for Newcastle district, and the Umberumberka scheme at Broken Hill.

[3] De Burgh was a member of the Institution of Civil Engineers, London, and was twice winner of the Telford premium.

[4] He married Constance Mary, née Yeo, on 20 March 1888 who survived him along with two sons and a daughter.