Idris Imad al-Din (Arabic: إدريس عماد الدين بن الحسن القرشي, romanized: Idrīs ʿImād al-Dīn ibn al-Ḥasan al-Qurashī; 1392 – 10 June 1468) was the 19th Tayyibi Isma'ili Dāʿī al-Muṭlaq and a major religious and political leader in 15th-century Yemen, as well as a notable theologian and the most important medieval Isma'ili historian. His work is fundamental for the history of the Fatimid Caliphate and the Isma'ili communities in Yemen.