Timothy Augustine Coghlan
| Born | 9 June 1856 Sydney, Colony of New South Wales |
|---|---|
| Died | 30 April 1926 (aged 69) London, England |
| Alma mater | Cleveland Street Public School Sydney Grammar School |
| Occupation(s) | Public servant, diplomat |
| Spouse | Helen Donnelly (m. 1897–1926) |
| Children | Austin Coghlan Eden Coghlan |
Sir Timothy Augustine Coghlan KCMG ISO FRSS MICE (9 June 1856 – 30 April 1926) was an Australian statistician, engineer, economic historian and diplomat. He held the post of New South Wales government statistician for 19 years, and served various periods as Agent-General for New South Wales in London from 1905 to his death in 1926.