Bangladesh Milk Producers' Cooperative Union Limited (BMPCUL) has emerged as a pioneeringcooperative organization in the country. Through its dairy development activities for the last threedecades BMPCUL has made a significant impact on the milk production and household income for thedairy cooperative members. Considering this fact, this paper explores the chronological development ofBMPCUL; extension of its areas and activities towards dairy development in Bangladesh and analysessome aspects of its performance in milk production and household income.