de Grey is a surname, and may refer to:
Arnald de Grey (1856–1889), English cricketer Aubrey de Grey (born 1963), English gerontologist George de Grey, 3rd Baron Walsingham (1776–1831), British peer and army officer George de Grey, 8th Baron Walsingham (1884–1965), British soldier and peer Henrietta Frances de Grey (1784–1848), Anglo-Irish political hostess and philanthropist Henry de Grey (1155–1219), English courtier Ida de Grey (1368–1426), Cambro-Norman noblewoman Sir John de Grey (died 1266), English soldier and high sheriff John de Grey, 1st Baron Grey de Rotherfield (1300–1359), English soldier and courtier Nigel de Grey (1886–1951), British codebreaker Reginald de Grey, 1st Baron Grey de Wilton (c.1240–1308), English nobleman Richard de Grey (died c.1271), English landowner Roger de Grey (1918–1995), British landscape painter Slim De Grey, Australian actor, musician and comedian Spencer de Grey (born 1944), British architect Thomas de Grey (1680–1765), British Member of Parliament Thomas de Grey (1717–1781), British Member of Parliament Thomas de Grey, 2nd Baron Walsingham (1748–1818), British politician Thomas de Grey, 2nd Earl de Grey (1781–1859), British politician Thomas de Grey, 4th Baron Walsingham (1788–1839), British peer and cleric Thomas de Grey, 5th Baron Walsingham (1804–1870), British peer Thomas de Grey, 6th Baron Walsingham (1843–1919), English politician and amateur entomologist William de Grey (1652–1687), English landowner and Member of Parliament William de Grey, 1st Baron Walsingham (1719–1781), British lawyer, judge and politician
See also Grey (surname) de Gray