Rezaul Karim Mannan () is a Bangladesh Nationalist Party politician and a former three-time member of parliament for Narayanganj-3.
Rezaul Karim Mannan was born to a Bengali Muslim family in the village of Ramgovindapur in present-day Shambhupura Union, Sonargaon Upazila, Narayanganj District. He has one son with his wife Suraiya Chowdhury Munni, a lawyer who died on 13 February 2017.
Rezaul Karim was elected to parliament from Narayanganj-3 as a Bangladesh Nationalist Party candidate in 1991, 1996, and 2001.