The Dyke Baronetcy, of Horeham in the County of Sussex, is a title in the Baronetage of England. It was created on 3 March 1677 for Thomas Dyke, Commissioner of Public Accounts and Member of Parliament for Sussex and East Grinstead. The second Baronet married Anne, daughter and heiress of Percival Hart. In 1836 the fifth Baronet unsuccessfully claimed the barony of Braye, of which peerage he was a co-heir through the Hart family. The seventh Baronet was a successful Conservative politician. In 2008, the tenth Baronet ran in the 40th Canadian General Election as the Green Party candidate for Hamilton East—Stoney Creek, Ontario.
Percyvall Hart Dyke (1872-1952), grandson of Reverend Thomas Hart Dyke, second son of the fifth Baronet, was a Colonel in the Indian Army. His son Trevor Hart Dyke was a Brigadier in the Queen's Royal Regiment. David Hart Dyke (b. 1938), son of Reverend Eric Hart Dyke, son of the aforementioned Colonel Percyvall Hart Dyke, is a retired Captain in the Royal Navy and commanded the H. M. S. Coventry during the Falklands War.