Lalbag subdivision is an administrative subdivision of Murshidabad district in the state of West Bengal, India.

The Bhagirathi River splits the Murshidabad district into two natural physiographic regions – Rarh on the west and Bagri on the east. The Lalbag subdivision is spread over both Bagri and Rarh physiographic regions from the Jalangi-Bhagirathi Interfluve to the Ganges-Bhagirathi basin to the Nabagram plains.

In 1704, when Murshid Quli Khan was Divan, he shifted his headquarters from Dhaka to Maksudabad and renamed it Murshidabad. In 1717, when Murshid Quli Khan became Subahdar, he made Murshidabad the capital of Subah Bangla (then Bengal, Bihar and Odisha).

After the defeat of Siraj ud-Daulah in the Battle of Plassey by the forces of the British East India Company, in 1757, Mir Jafar became a puppet ruler. In 1773, the East India Company established a capital in Calcutta and appointed its first Governor-General, Warren Hastings, and became directly involved in governance.

Murshidabad district is divided into the following administrative subdivisions:

Lalbag subdivision has 6 police stations, 5 community development blocks, 5 panchayat samitis, 44 gram panchayats, 474 mouzas, 430 inhabited villages and 2 municipalities. The municipalities are: Murshidabad and Jiaganj Azimganj. The subdivision has its headquarters at Murshidabad.

Police stations in Lalbag subdivision have the following features and jurisdiction:

Murshidabad district has a 125.35 km long international border with Bangladesh of which 42.35 km is on land and the remaining is riverine.