Roger Williams may refer to:
- Roger Williams (soldier) (1539/1540–1595), Welsh soldier of fortune
- Roger Williams (theologian) (1603–1683), English theologian, co-founder of Rhode Island
- Roger Williams (chemist) (1890–1978), chemist at Du Pont, Perkin Medal recipient
- Roger J. Williams (1893–1988), American biochemist
- Roger Q. Williams (1894–1976), American aviator
- Roger Williams (pianist) (born 1924), American pianist
- Roger Williams (UK politician) (born 1948), British politician
- Roger Williams (US politician) (born c. 1950), American politician
- Roger Williams (professor), Welsh educationalist
- Roger Williams (hepatologist), British liver specialist
- Roger Williams (playwright) (born 1974), Welsh playwright
Roger Williams may also refer to:
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