Herman Smith is the name of:

Herman Smith (gridiron football) (born 1971), American former gridiron football player Herman L. Smith (1892–1950), American mathematician Herman Smith, real name of the Wizard of Oz in The Wiz Herman Smith, namesake of the Smith-Harris House Red Smith (coach), (1906–1959), American football, baseball, and track coach

See also Herman Smith-Johannsen (1875–1987), supercentarian