The Al-Saggoff Family (Arabic: السقاف ; transliterated elsewhere al-Saqqaf or al-Saqqāf) were Arab Singaporean spice traders of Hadhrami Arabic origin who became influential by marrying into a royal family from the Celebes (now Sulawesi, Indonesia). They acquired many properties, like the other Arab families, including the "Perseverance Estate" where they grew lemon grass. The estate is now considered to be the heart of the Muslim community in Singapore, with the Alsagoff family still retaining its prominence in Singapore.
As well as being successful merchants and land owners, the family became involved in civic affairs. The family members, at times, held civic office from the 1870s until Singaporean independence in 1965.
Syed Abdul Rahman (Arabic: سيد عبد الرحمن السقاف Saiyid ʿAbd ar-Raḥman al-saqqāf) was the founder of the merchant family came to Singapore with his son Ahmed and established his firm Alsagoff and Company in 1848. His son Syed Ahmed married Princess Raja Siti, the daughter of Princess Hajjah Fatimah, a Malaccan who was married to the Sultan of Gowa Karaeng Chanda Pulih of Bugis royalty but who had maintained a trading post at Singapore. Hajjah Fatimah built the historical namesake mosque on Beach Road in Kampong Glam. The Alsagoff family also started the Arabic School in Jalan Sultan in 1912.
A large section of Geylang formally Geylang Serai formed part of the 'Perseverance Estate' which belonged to Syed Ahmed Alsagoff. The Alsagoffs had also served as Singapore Municipal commissioners from 1872 to 1898 and from 1928 to 1933.
Syed Mohamad (Arabic: سيد محمد بن أحمد السقاف Saiyid Muḥammad bin Aḥmad al-Saqqāf) was the most prominent member of the family. He received two land concessions from Sultan Abu Bakar of Johore; one in Kukup where he could print his own currency and the other in Kampong Nong Chik.