Sir William Hart Dyke, 7th Baronet PC, DL, JP (7 August 1837 – 3 July 1931) was an English Conservative politician and tennis pioneer.

[3] In 1873 he played lawn tennis in a significant early match with John Moyer Heathcote and Julian Marshall at his home of Lullingstone Castle.

In 1875 with Heathcote he was a member of the Marylebone Cricket Club committee that framed the original set of rules for tennis.

[2] Hart Dyke married Lady Emily Caroline Montague, daughter of the 7th Earl of Sandwich, in 1870.

[4] The elder Lady Hart Dyke survived her husband by only a month and died in August 1931.