Spencer Smith may refer to:
Spencer Smith (musician) (born 1987), American founding member and drummer of the band Panic! at the Disco Spencer Smith (triathlete) (born 1973), British triathlete Spencer Smith (Big Brother) (born 1979), contestant in Big Brother UK John Spencer Smith (1769–1845), British diplomat, politician and writer Spencer-Smith, a surname Spencer Smith (Playmate) Spencer Smith Park, in Burlington, Ontario