Dinwiddie (also Dinwiddy) is a surname. Notable people with the name include:
Dinwiddie Bill Dinwiddie (born 1943), American basketball player Gene Dinwiddie (1936–2002), American blues saxophonist Hardaway Hunt Dinwiddie (1844–1887), 4th President of Texas A&M, founding member of Alpha Tau Omega James Dinwiddie (surgeon), Confederate military surgeon James Dinwiddie (astronomer) (1746–1815), Scottish natural philosopher Marcus Dinwiddie (1906–1951), American sport shooter Michael Dinwiddie (1954–2025), American playwright and professor Robert Dinwiddie (1693–1770), British lieutenant governor of colonial Virginia Robert Dinwiddie (golfer) (born 1982), English golfer Ryan Dinwiddie (born 1980), American gridiron football quarterback Spencer Dinwiddie (born 1993), American professional basketball player Traci Dinwiddie (born 1973), American film and television actress William Dinwiddie (1867–1934), American journalist, war photographer, writer and colonial administrator in the Philippines
Dinwiddy Bruce Dinwiddy (1946–2021), governor of the Cayman Islands Hugh Dinwiddy (1912–2009), English cricketer
See also Dinwiddie (disambiguation)