Richard Grosvenor, 2nd Marquess of Westminster, styled The Honourable Richard Grosvenor from 1795 to 1802, Viscount Belgrave from 1802 to 1831 and Earl Grosvenor from 1831 to 1845, was an English politician, landowner, property developer and benefactor.

Robert Grosvenor, 1st Marquess of Westminster, was the son of the 1st Earl Grosvenor, whom he succeeded in 1802 as 2nd Earl Grosvenor. He was created Marquess of Westminster in 1831. He was an English Member of Parliament (MP) and an ancestor of the modern-day Dukes of Westminster. Grosvenor continued to develop the family's London estates, he rebuilt their country house, Eaton Hall in Cheshire where he also restored the gardens, and built a new London home, Grosvenor House. He maintained and extended the family interests in the acquisition of works of art, and in horse racing and breeding racehorses.