Aquifer Mapping and Management Plan has been carried out in Nagaon district, Assam under National Aquifer Mapping and Management Plan (NAQUIM) program with an objective to know the different aquifer system prevailing in the study area, to decipher the vertical and lateral extend of the aquifer down to the depth of 200 m, its characteristic, quantity as well as quality so as to bring a complete sustainable and effective aquifer management plan for ground water resource development in the study area. These studies have been done through multi-disciplinary approach so as to achieve the said objectives. The total coverage area of aquifer mapping and management plan is 3773 sq.km out of total geographical area of 3972 sq.km of the district. The district is underlain by unconsolidated recent alluvium, consolidated Banded Gneissic complex, Quartzite and semi consolidated formation of Tertiary age. The geological formation ranges from Pre Cambrian Group of rocks, semi consolidated formation of Tertiary age and unconsolidated alluvium of Quaternary age. The alluvium occurring in the district is of recent alluvium. Occurrence of ground water in the study area is within the saturated intergranular pore spaces of unconsolidated Brahmaputra alluvium and weathered and fractured consolidated and semi-consolidated rocks. Finally, the aquifer map of the study area is generated based on the inputs from geological, hydrogeological and hydrochemical studies and a management plan was made with an emphasis in providing irrigation facilities through ground water development as agriculture is the main means of livelihood of the people living in the district.