Lionel Smith may refer to:

• Lionel Smith (footballer) (1920–1980), English footballer
• Lionel Mark Smith (1946–2008), American actor
• Sir Lionel Smith, 1st Baronet (1778–1842), British diplomat, colonial administrator and soldier
• Lionel Smith (athlete), New Zealand hurdler
• Lionel Smith (legal scholar), Canadian legal scholar, incumbent Professor of Comparative Law at the University of Oxford