| Office: | Member of Parliament for Weymouth and Melcombe Regis |
| Termstart: | 30 April 1781 |
| Termend: | 1784 |
| Party: | Whig |
| Birth Date: | 1 March 1760 |
| Predecessor: | William Chaffin Grove |
| Successor: | Thomas Rumbold |
| Alma Mater: | Harrow School |
| Alongside: | Welbore Ellis, John Purling and Gabriel Steward |
William Richard Rumbold (1 March 1760 – 14 June 1786) was an English politician who was Member of Parliament for Weymouth and Melcombe Regis from 1781 to 1784.
Rumbold was the son of Governor of Madras Thomas Rumbold. His brothers George Rumbold was an ambassador and his brother Charles Rumbold was a fellow MP.[1] Rumbold came to India in 1778 and became a Aide-de-Camp to Sir Hector Munro. He held the rank of Captain in the 1st Foot Guards and fought in the Siege of Pondicherry in October 1778. His father was sent back to England for enquiry on misconduct and illegal acquisition of wealth. When he became a member of Parliament for Weymouth, he supported his father and sought the downfall of Lord North. Both he and his father failed to obtain a seat for Shaftesbury.