The Sayed Jamaluddin Mosque (Bengali: সৈয়দ জামালুদ্দিনের মসজিদ; Arabic: مسجد سيد جمال الدين) is a former mosque and archaeological site, now in partial ruins, located in the ancient city of Saptagram in Hooghly district, West Bengal.

The mosque was built during the reign of the Bengali sultan Nasiruddin Nasrat Shah.

Within the mosque complex are three tombs, which belong to Sayed Fakhruddin, his wife, and his eunuch.

the ruined mosque is under the maintenance of Archaeological Survey of India (ASI).

This article about a mosque or other Islamic place of worship in India is a stub.