Alan or Allan Smith may refer to:
- Alan Smith (footballer, born 1921) (1921–2019), English football left winger
- Alan Smith (footballer, born 1939) (1939–2016), English footballer for Torquay United
- Alan Smith (footballer, born 1949), Welsh footballer for Newport County
- Alan Smith (footballer, born 1950), English football winger for York City
- Alan Smith (footballer, born 1962), English footballer for Leicester City and Arsenal, current pundit
- Alan Smith (footballer, born 1966), English footballer for Darlington
- Alan Smith (footballer, born 1980), English footballer for Leeds United and Manchester United
- Alan Smith (football manager) (born 1946), English former manager of Crystal Palace
- Alan Smith (physiotherapist) (1948/1949 – 2023), England and Sheffield Wednesday physio
- Allan Smith (New Zealand footballer), New Zealand international football (soccer) player
- Allan Smith (solicitor) (1871–1941), British Conservative Party politician, MP for Croydon South 1919–1923
- Allan F. Smith (1911–1994), American professor of law at the University of Michigan
- Alan Gilbert Smith (1937–2017), English geologist and geophysicist
- Alan Smith (geneticist) (born 1945), British geneticist
- Alan Jay Smith (born 1951), American computer scientist
- Alan J. Smith (architect) (born 1949), English architect
- Alan Smith (radio presenter) (born 1966), British journalist
- Alan Smith (bishop) (born 1957), British bishop of St Albans
- Alan Smith (RAF officer) (1917–2013), English Second World War fighter ace
- Cris Alexander (born Alan Smith, 1920–2012), American actor and photographer
- Sam Smith (toy-maker) (1908–1983), artist, sculptor and toymaker