Carl Petersen

Carl Petersen may refer to:
 * Carl Wilhelm Petersen (1868–1933), German politician and first mayor of Hamburg
 * Carl Petersen (athlete) (1902–1983), Danish Olympic athlete
 * Carl Emil Petersen (1875–1971), American Medal of Honor recipient
 * Carl Petersén (born 1883) (1883–1963), Swedish military officer
 * Carl Wilhelm Petersén (1884–1973), Swedish curler
 * Carl Petersen (Danish politician) (1894–1984), Danish politician of the Social Democratic Party
 * Carl Petersen (neuroscientist), Denmark-born Swiss neuroscientist at EPFL
 * Carl Friedrich Petersen (1809–1892), Hamburg lawyer and politician
 * Carl Petersen (architect) (1874–1923), Danish architect of the Nordic Classicism movement
 * Sandy Petersen (born 1955), American programmer