David Cox may refer to:

David E. Cox (born 2000), American soccer player

• David A. Cox (born 1948), American mathematician
• David Cox (artist) (1783–1859), British landscapist
• David Cox (Australian politician) (born 1954), Australian federal politician
• David Cox (footballer) (born 1989), Scottish footballer
• David Cox (gymnast) (born 1970), British Olympic gymnast
• David Cox (Marine) (1966–1994), U.S. Marine found killed by an unknown assailant
• David Cox (statistician) (1924–2022), English statistician
• David Cox (1960s cricketer) (born 1946), British cricketer, played for Somerset
• David Cox (1990s cricketer) (born 1972), British cricketer, played for Durham
• David Cox (Scottish cricketer) (born 1973), Scottish cricketer
• David Cox Jr. (1809–1885), British landscapist
• David Cox (composer) (1916–1997), British composer
• David Cox (basketball) (born 1973), American college basketball coach
• David Cox, musician of London-based duo AutoKratz
• Dave Cox (1938–2010), American politician
• David Neal Cox (1970–2021), American convicted murderer
• David Cox (historian and mountaineer) (1913-1994), (Anthony David Machell Cox)