Sontag is a surname. Notable people with the surname include:
Alan Sontag (born 1946), American bridge player and author
Andrzej Sontag (born 1952), Polish triple jumper
Brett Sontag (born 1970), American racecar driver
David Sontag, American catcher and actor
Eduardo Daniel Sontag (born 1951), American/Argentine mathematician
Frank Sontag (born 1955), American talk radio show host
Frederick Sontag (1924–2009) American author and educator
George Contant Sontag (1864–unknown), American outlaw
Henriette Sontag (1806–1854), German operatic soprano
John Sontag (1861–1893, American outlaw
Larry Sontag, American catcher and actor
Susan Sontag (1933–2004), American essayist, novelist, filmmaker, and activist
Tiga Sontag (born 1974), Canadian DJ/producer
Tony Sontag, English darts player
