Syedna Yusuf Najmuddin bin Sulayman (Arabic: يوسف نجم الدين بن سليمان, romanized: Yūsuf Najm al-Dīn bin Sulaymān) (died on 23 June 1567 CE or 16 Dhu al-Hijjah 974 AH, Taibah, Yemen)[1] was the 24th Da'i al-Mutlaq (Absolute Missionary) of the Taiyabi Ismailis.

His sharp intellect and curiosity soon caught the attention of the 23rd Da'i, Syedna Mohammad Ezzuddin, who then personally began to educate him, tutoring him every alternate day.

[2] After this, he decided to travel to Yemen, where enemies had captured many fortresses belonging to the Da'wah in the era of Arwain Pasha, who was the governor of the region under Ottoman Turks.

Books and other theological and literary works of the era of previous Du'āt were transferred to India.

Syedna Yusuf Najmuddin gave nass or succession to Jalal Shamshuddin bin Hasan of Ahmedabad as his successor, the 25th Da'i.