| Sir John Duckworth | |
| Honorific-Suffix: | Bt |
| Office: | Member of Parliament for Exeter |
| Term Start: | 7 July 1845 |
| Term End: | 27 March 1857 |
| Alongside: | Edward Divett |
| Predecessor: | William Webb Follett Edward Divett |
| Successor: | Richard Gard Edward Divett |
| Birth Date: | 17 March 1809 |
| Nationality: | British |
| Party: | Conservative |
| Parents: | John Duckworth Susanna Catherine Buller |
| Children: | Three daughters |
Sir John Thomas Buller Duckworth, 2nd Baronet (17 March 1809 – 29 November 1887) was a British Conservative politician.
He was the son of his namesake John Duckworth and Susanna Catherine Buller. He was educated at Eton College, and matriculated at Oriel College, Oxford in 1826, graduating B.A. in 1829. He inherited the baronetcy of Topsham in 1817 on the death of his father.[1]
Duckworth was elected Conservative MP for Exeter at a by-election in 1845—caused by the death of William Webb Follett—and held the seat until 1857 when he did not seek re-election at that year's general election.[2]
Duckworth married Mary Isabella Buller, daughter of John and Harriet Buller, in 1850, and they had three children: Mary Georgiana (born 1852); Evelyn Harriet (born 1857); and, Fanny Catherine (born 1860).