Iffat bint Mohammad Al Thunayan (1916–2000) was a Saudi women's education activist.

Iffat or Effat may also refer to:

• Efat Ghazi (1935–1990), Kurdish refugee from Iran who was killed by a letter bomb
• Effat Marashi (born 1935), widow of former Iranian president
• Effat Moridi (1929–2013), Iranian activist for mass execution victims
• Effat Nagy (1905–1994), Egyptian artist
• Effat Nssar (born 1964), Egyptian footballer and coach
• Effat Shariati (born 1952), Iranian politician
• Effat Tejaratchi (1917–1999), first Iranian female aviator
• Iffat Ara (born 1939), Bangladeshi writer, social activist, and literary organizer
• Iffat Miraj Awan (born 1971), Pakistani politician
• Iffat-un-Nissa Begum, Mughal princess
• Iffat Ara Dewan, Bangladeshi singer and painter
• Iffat Liaqat, Pakistani politician
• Iffat Liaqat Ali Khan, Pakistani politician
• Iffat Rahim (born 1975), Pakistani actress and model

• Emad Effat (1959–2011), Egyptian Sunni Islamic cleric who was killed in a protest

• Effat University, private school in Jeddah, Saudi Arabia