Sir Edward Knatchbull, 9th Baronet, PC, FRS (20 December 1781 – 24 May 1849) was a British Tory politician.

Knatchbull was elected as a Member of Parliament (MP) for Kent at a by-election in November 1819, to fill the vacancy caused by the death of his father.

The Reform Act 1832 split the Kent county constituency into Eastern and Western divisions, and at the 1832 general election Knatchbull and John Pemberton Plumptre were elected as Members for the new Eastern division of Kent.

They married on 25 August 1806 and had six children: Annabella died in childbirth in 1814 and on 24 October 1820, Knatchbull married secondly Fanny Catherine Knight, daughter of Edward Knight (né Edward Austen, the brother of English novelist Jane Austen).

They had nine children, including: Knatchbull died in May 1849, aged 67, at the family's Mersham Hatch estate in Kent, and was succeeded in the baronetcy by his son from his first marriage, Norton.