John G. Smith

John G. Smith may refer to:


 * John G. Smith (poet) (died 1891), 19th century Scottish poet
 * John Gordon Smith (surgeon) (1792–1833), Scottish surgeon and professor of medical jurisprudence
 * John Gordon Smith (politician) (1863–1921), member of the Queensland Legislative Council
 * J. Gregory Smith (1818–1891), Governor of Vermont
 * John G. Smith (coach) (1924–1998), American college baseball, football and basketball coach
 * John Smith (Maine politician), Mayor of Saco, Maine and Ku Klux Klan supporter