Shah Syed Nasiruddin (Bengali: শাহ সৈয়দ নাসিরুদ্দীন, Arabic: شاه سيد ناصر الدين) was a Sufi saint and military leader associated with the spread of Islam in Bengal in the 14th century. As the commander of the armed forces (Sipah Salar) of Sultan Shamsuddin Firoz Shah, Syed Nasiruddin is primarily known for his role in the Conquest of Sylhet in 1303, alongside the celebrated Sufi dervish Shah Jalal.