Harry T. Willetts (1922–2005) was an English scholar of Russian. A professor of Russian history at Oxford University, he was director of the Russian and East European Centre at St Antony's College, Oxford, where his colleagues included the noted Russian scholars Max Hayward, Harry Shukman and William Deakin. A prolific translator of Russian literature, he is best known for his translations of the works of the Nobel Prize winner Alexander Solzhenitsyn. As a translator, he is often credited as H.T. Willetts.
He was preceded in death by his Polish wife Halina. Their son Sam Willetts is a poet.