There have been several people named John Snow:

• Dr. John Snow (physician), the founder of epidemiology and a major contributor to the development of anaesthesia
• John W. Snow, United States Secretary of the Treasury from 2003-2006
• John Snow (cricketer), English cricketer

See also

• Jon Snow (A Song of Ice and Fire), a character in George R. R. Martin's novel series A Song of Ice and Fire
• Jon Snow, British newscaster

John Snow