Swett is the surname of:

• Benjamin Swett, American photographer and writer
• Emelie Tracy Y. Swett (1863–1892), American poet, author, editor
• James E. Swett (1920–2009), US Marine Corps World War II fighter ace and Medal of Honor recipient
• John Swett (1830–1913), founder of the California public school system
  • John Swett High School in Crockett, California, U.S.
  • John Swett Unified School District
• Jorge Swett (1926–2012), Ecuadorian muralist, painter, lawyer and writer
• Katrina Swett (born 1955), consultant
• Leonard Swett (1825–1889), American lawyer who advised President Lincoln
• María Elena Swett (born 1979), Chilean actress
• Pop Swett (1870–1934), baseball player
• Richard Swett (born 1957), American politician