Sir Thomas Thomson Ewing KCMG (9 October 1856 – 15 September 1920) was an Australian politician.

[1] In 1885 Ewing left the Lands Department to stand, successfully, for the New South Wales Legislative Assembly, representing the seat of Richmond.

[1][2] Ewing moved to federal politics in 1901, entering the Australian House of Representatives as the Protectionist member for Richmond.

Ewing retired from politics in 1910 due to ill health, and began farming on the Tweed River.

He also wrote scholarly works and published Progress of Australasia During the Nineteenth Century with Sir Timothy Coghlan in 1903, and Review of the Rival Railway Schemes for the Connection of the Tableland of New England with a Deep Sea Port on the North Coast in 1913.