Thomas Parnell
- This article is about the poet. Thomas Parnell (scientist) started the pitch drop experiment in 1927

Thomas Parnell (September 11, 1679 – October 24, 1718) was a poet, born in Dublin and educated at Trinity College, Cambridge. He was a friend of both Alexander Pope and Jonathan Swift, contributing to The Spectator, and aiding Pope in his translation of The Iliad. He was one of the so-called "Graveyard poets".
Pope collected and edited his poems in 1721, and Oliver Goldsmith wrote a biography of him.