Sir Thomas Henry Havelock FRS (24 June 1877 – 1 August 1968) was an English applied mathematician, hydrodynamicist and mathematical physicist.
At the age of sixteen, he entered Durham College of Physical Science.
He matriculated in 1897 at St John's College, Cambridge and graduated there B.A.
From 1903 to 1909 he was a Fellow of St John's College, Cambridge.
He was a professor of applied mathematics at Armstrong College from 1914 until his retirement in 1945.