Rassias is a surname. Notable people with the surname and uses of the name include:
John Rassias (1925-2015), American language-teaching pioneer Dartmouth College's Rassias Center for World Languages and Cultures which he founded Themistocles M. Rassias (born 1951), Greek mathematician Aleksandrov–Rassias problem Cauchy–Rassias stability Hyers–Ulam–Rassias stability Vlassis G. Rassias (1959–2019), Greek writer and neopagan leader