Alan or Allan Cox may refer to:

• Alan Cox (computer programmer) (born 1968), British computer programmer and Linux developer
• Alan Cox (actor) (born 1970), English actor
• Alan Cox (footballer) (1920–1993), footballer for Tranmere Rovers
• Alan Cox (radio personality) (born 1971), radio host
• Allan Cox (author) (1937–2016), American consultant and author
• Allan Cox (cricketer) (1873–1896), Barbadian cricketer
• Allan Leslie Cox (1927–1996), Canadian politician in the Legislative Assembly of British Columbia
• Allan V. Cox (1926–1987), American geophysicist