Kilgariff or Kilgarriff is a surname. Notable people with the surname include:
People Adam Kilgarriff (1960–2015), British corpus linguist Bernie Kilgariff (1923–2010), Australian politician Karen Kilgariff (born 1970), American actress and writer Michael Kilgarriff (born 1937), British actor
Places Kilgarriff, County Cork, a civil parish in County Cork, Ireland Kilgariff, Northern Territory, a suburb in Australia