Nadia is a district in the state of West Bengal, India. It borders Bangladesh to the east, North 24 Parganas and Hooghly districts to the south, Purba Bardhaman to the west, and Murshidabad to the north.

Located in the heart of the Bengal plains, Nadia has a long history. It was one of the last regions of Bengal to be under the control of the Sena dynasty, and was home to many independent principalities who nominally paid respects to outside powers. After the Battle of Plassey in Palashi town, Nadia came under British rule. During Partition, the district was split and large parts of Nadia went to East Bengal (Bangladesh).

Nadia district is highly influential in the cultural history of Bengal. The standard version of Bengali, developed in the 19th century, is based off the dialect spoken around Nadia. Known as the “Oxford of Bengal”, Nabadwip made many contributions to Indian philosophy, such as the Navya-Nyaya system of logic and is the birthplace of the Vaishnava saint Chaitanya Mahaprabhu. The district is still largely agricultural.

Nadia district is located in southern West Bengal, in the west-central Bengal region. The district is largely alluvial plain, formed by the constant shifting of the various rivers of the Ganges Delta. To the west of the district is the Bhagirathi (or Hooghly) river, which was once the main distributary of the Ganga towards the Bay of Bengal, and is still considered to be the continuation of the Ganga for Hindus.

 As the main flow of the Ganga flowed east into the Padma, the Bhagirathi largely dried up. Most of the rivers now flowing through Nadia now have little water in them. Nearly all the district has been converted into farmland.