Thomas Daniel Tremlett (14 February 1834 – 22 January 1894) was an English cricketer who played first-class cricket in four matches for Cambridge University in 1853 and 1854.^[1] He was born at Rodney Stoke in Somerset and died at Harrow, Middlesex.

Tremlett was educated at Eton College and at King's College, Cambridge.^[2] He played cricket at Eton and featured in the annual Eton v Harrow match in three seasons from 1850 to 1852.^[1] In these games, and then later at Cambridge, he batted anywhere in the batting order from opening the innings to being the No 11, and he also took wickets; however, there is no record of whether he batted right- or left-handed or of his bowling style. His best score in his four first-class games came in his first match: an innings of 28 against the Marylebone Cricket Club.^[3] In 1854, his three matches included the University Match against Oxford University, and he is therefore recorded as having achieved a Blue.^[4] The game was his final first-class appearance.

Tremlett graduated from Cambridge University with a Bachelor of Arts degree in 1857, and this was automatically converted to a Master of Arts in 1860.^[2] He became a Fellow of King's College until he disqualified himself by marrying in 1873; he also became a lawyer at Lincoln's Inn and was called to the bar in 1861.^[2]