John S. Smith

John S. Smith may refer to:


 * John Shuter Smith (died 1871), Canadian lawyer
 * John Sidney Smith (legal writer) (1804–1871), English legal writer
 * John Sidney Smith (rugby union) (1860–?), English rugby union forward
 * John Speed Smith (1792–1854), American politician
 * John Stafford Smith (1750–1836), British composer
 * John Samuel Smith (1841–1882), New South Wales politician
 * John Spencer Smith (1769–1845), British diplomat, politician and writer
 * John Smalman Smith, British judge in the Colony of Lagos