Swartz is a German surname related to the German(-Jewish)/Yiddish word Schwarz, which means the colour black. It may refer to:

• Aaron Swartz (1986–2013), American computer programmer and activist
• Aaron Swartz (actor), English actor and director
• Arthur L. Swartz (1888–1940), New York politician
• Beth Ames Swartz (born 1936), American artist
• Bud Swartz (1929–1991), American professional baseball pitcher
• Carl Swartz (1858–1926), Swedish politician
• Charles S. Swartz (1939–2007), American filmmaker, researcher and academic
• Clarence Lee Swartz (1868–1936), American individualist anarchist
• Dan Swartz (1931–1997), American basketball player
• Elsa Swartz (1874–1948), American composer
• Edvard Swartz (1826–1897), Swedish actor
• George Swartz (1928–2006), South African religious leader, Bishop of Kimberley and Kuruman
• Harry Swartz (born 1996), American soccer player
• Harvie S (born 1948), stage name of American jazz double-bassist Harvie Swartz
• Jeffrey Swartz (born 1960), American businessman, former CEO of Timberland
• Jerome Swartz (born 1940), American physicist
• Joshua William Swartz (1867–1959), American politician congressman
• Kit Swartz, American television news producer
• Marc Swartz (1931–2011), American political and cultural anthropologist
• Maud O'Farrell Swartz (1879–1937), American labor leader
• Merlin Swartz (1933–2022), American Islamic studies professor
• Monty Swartz (1897–1980), American professional baseball pitcher
• Norman Swartz (born 1939), American academic and philosopher
• Olof Swartz (1760–1818), Swedish biologist
• Oscar Swartz (born 1959), Swedish entrepreneur, writer and blogger
• Oswald Swartz (born 1953), South African religious leader, Bishop of Kimberley and Kuruman
• Reginald Swartz (1911–2006), Australian politician
• Roberta Teale Swartz (1903–1993), American academic and poet
• Shane Swartz (born 1975), American boxer
• Tenille Swartz (born 1987), South African squash player
• Tony Swartz (1943–2016), American actor