Robert Grosvenor may refer to:
Sir Robert Grosvenor, 6th Baronet (1695–1755), English Member of Parliament Robert Grosvenor, 1st Marquess of Westminster (1767–1845), English Member of Parliament Robert Grosvenor, 1st Baron Ebury (1801–1893), British courtier and Whig politician Robert Grosvenor, 2nd Baron Ebury (1834–1918), British politician Robert Grosvenor, 5th Duke of Westminster (1910–1979), British soldier, landowner, businessman and politician Robert Grosvenor, 5th Baron Ebury (1914–1957), British politician Lord Robert Edward Grosvenor, the fourth son of Hugh Grosvenor, 1st Duke of Westminster Robert Grosvenor (aviator) (1895–1953), World War I flying ace Robert Grosvenor (artist) (1937–2025), American sculptor