The Momin Ansari (مومن أنصاري) or saudagar are a Muslim community of merchants found mainly in India, Pakistan, and Nepal. The surname originated from Ansar tribe, the Medinan people who helped the Islamic prophet, Muhammad, in his migration from Mecca to Medina. They were the first tribe in Arabia to accept Islam. The literal meaning of Ansar is "supporter".
In North India, the community are known as Ansari or Shaikh while in Maharashtra the community are known as Momin or saudagar
Althought the community can be found throughout the Indian subcontinent, the Varanasi District in Uttar Pradesh is always regarded by most Momin as the centre of their community. In that city, the Ansari are said to make up a third of the city's population. Important Ansari neighbourhoods in the city include Madanpura, Adampura and Jaitpura. There are many people outside South Asia with the surname Ansari; however, this article is strictly about a Muslim South Asian community.