Kusumba Mosque (Bengali: কুসুম্বা শাহী মসজিদ) is a mosque in Manda Upazila of Naogaon District of Bangladesh. This mosque can be found in the village of Kusumba, which is its namesake. It was built in 1558–59 and is one of Bangladesh's national heritages sites. The mosque is often nicknamed "The Black Gem of Bangladesh".
Construction on the mosque began in 1558 and ended in 1559, according to an inscription on the exterior of the mosque. During this period, Bangladesh had a string of Afghani rulers. The Kusumba mosque was built under one of the last Suri rulers, named Ghiyasuddin Bahadur Shah. The actual construction of the mosque was overseen by a high-ranking official named Sulaiman. Although the mosque was built under the Suri rule, the architectural pattern was not influenced by earlier Suri architecture of North India. Instead, the mosque was built in the style of other Bangladeshi mosques The Kusumba Mosque went on to serve as inspiration for other mosques in Bangladesh and Myanmar.