Vasileiou or Vas[s]iliou () is a Greek surname. Notable people with the surname include:
Alexandros Vasileiou (1760–1818), Greek merchant and scholar Alexia Vassiliou (born 1964), Cypriot singer and musician Androulla Vassiliou (born 1943), Cypriot politician Eleni Vasileiou (born 1974), Greek basketball player George Vasiliou (1931–2026), Cypriot politician, President of Cyprus (1988–1993) Giorgos Vasiliou (1950–2016), Greek actor Giorgos Vasiliou (footballer) (born 1984), Cypriot footballer Mari Vasileiou (born 1990), Cypriot beauty pageant winner Maria Vassiliou (1950–1989), Cypriot actress Marius Vassiliou (born 1957), American geophysicist Markos Vassiliou (born 1983), Greek musician Michael Vasileiou, Greek merchant Nikos Vasiliou (born 1977), Greek footballer Panagiotis Vasiliou (born 1961), Greek squash champion Spyros Vassiliou (1902–1985), Greek painter Stylianos Vasileiou (born 1991), Greek footballer