John S. Smith
John S. Smith may refer to:
- John Shuter Smith, Canadian lawyer
- John Sidney Smith (legal writer), English legal writer
- John Sidney Smith (rugby union), English rugby union forward
- John Speed Smith, American politician
- John Stafford Smith, British composer
- John Samuel Smith, New South Wales politician
- John Spencer Smith, British diplomat, politician and writer
- John Smalman Smith, British judge in the Colony of Lagos