Saiful Islam or Saif al-Islam (; "Sword of Islam"), may refer to:
People Khalid ibn al-Walid, general and companion to the Islamic prophet Muhammad Tughtakin ibn Ayyub, second Ayyubid emir of Yemen and Arabia between 1182 and 1197 Saiful Islam Khan (1942–2019), Bangladeshi poet and literary critic Ahmed Seif El-Islam (1951–2014), Egyptian politician Abuhena Saifulislam (born 1963), imam chaplain in the US armed forces Saiful Islam (chemist) (born 1963), British chemist Saiful Islam (cricketer, born 1969), Bangladeshi cricketer Mohammad Saiful Islam (born 1970), Bangladeshi politician Saif al-Islam Gaddafi (1972–2026), son of former Libyan leader Muammar Gaddafi Saiful Islam Mannu (born 1972), Bangladeshi film director Shaiful Islam (born 1983), Bangladeshi cricketer Saiful Islam Hiru, Bangladeshi politician Saiful Islam (film editor), Bangladeshi film editor Saiful Islam Badal, Bangladeshi cinematographer Saiful Islam Joarder, Bangladeshi army fugitive Saiful Islam Duke, Bangladesh Navy lieutenant commander Saiful Islam (Natore politician), Bangladeshi advocate and politician Saiful Islam (vice-chancellor), former vice-chancellor of Bangladesh University of Engineering and Technology and AIUB Saif al-Islam al-Masri, Egyptian member of al-Qaeda Saiful Islam (police officer) Other The Sword of Islam, a 1987 British documentary film Sword of Islam (Mussolini), a ceremonial weapon given in 1937 to Benito Mussolini
See also Sayf al-Din (disambiguation)