Cass is the surname of:
Amelia Cass (born 1999), British para-cyclist Annie Cass, later Annie Pearson, Viscountess Cowdray (1860–1932), British philanthropist and suffragist Barbara Cass-Beggs (1904–1990), Canadian folk song collector, singer and teacher Bettina Cass (born 1940), Australian sociologist and social policy adviser Brian Cass (born 1947), British business executive David Cass (1937–2008), American economist Dick Cass (born 1946), President of the National Football League's Baltimore Ravens Eleanor Baldwin Cass (1874–1966), American fencer Frank Cass (1930–2007), British publisher of books and academic journals Frederick Cass (1913–2000), Canadian politician George Washington Cass (1810–1888), American industrialist and president of the Northern Pacific Railway Godfrey Cass (1867–1951), Australian actor Harriet Cass (born 1952), British radio broadcaster Henry Cass (1902–1989), English film director Hilary Cass, British physician John Cass (1661–1718), English politician and philanthropist Lewis Cass (1782–1866), American Democratic presidential nominee in 1848, Secretary of State, Secretary of War, Michigan Governor Lewis Cass Jr. (1814–1878), American diplomat Maurice Cass (1884–1954), character actor Melnea Cass (1896–1978), American community and civil rights activist Moss Cass (1927–2022), Australian former politician Oren Cass (born 1983), American public policy commentator and political advisor Peggy Cass (1924–1999), American actress, comedian and game show panelist Robin Cass Canadian film and television producer Rodney Cass (1940–2018), English cricketer Ronald Cass (1923–2004), screenwriter and composer Thomas Cass (colonel) (1821–1862), Union colonel in the American Civil War Thomas Cass (surveyor) (1817–1895), pioneer surveyor in New Zealand