John S. Williams
John S. Williams may refer to:
- John Sam Williams (born 1966), American basketball player
 - John Scott Williams (1893–1944), Canadian air force officer
 - John Sharp Williams (1854–1932), US Senator from Mississippi and Minority Leader of the House of Representatives
 - John Sibley Williams (born 1978), American poet and fiction writer
 - John Skelton Williams (1865–1926), American Comptroller of the Currency
 - John Stewart Williams (1911–1964), English cricketer
 - John Stuart Williams (1818–1898), American Confederate general and US Senator from Kentucky
 
See also
- John Williams (disambiguation)
 - John Stewart Williamson (1908–2006), American science fiction writer
 - John Suther Williamson (c. 1775 – 1836), British army officer