Abecassis or Abécassis or Abecasis (, ) is a Sephardic patronymic most commonly found among Moroccan Jews. Notable people with the surname include:
Raymonde Abecassis, (born 1943), Moroccan-Israeli singer and actress Eliette Abécassis (born 1969), French writer Eryck Abecassis (born 1956), French composer and musician George Abecassis (1913–1991), English race driver Gonçalo Abecasis (born 1976), Portuguese genetic epidemiologist Yael Abecassis (born 1967), Israeli actress Nina Pinto-Abecasis (1971–2019), Israeli folklorist