It is part of Tirhut district and in 1869 the Lalganj Nagar Board was formed, at that time it was the 2nd place of Bihar in which there were 11 Commissioners and Hajipur and Sitamarhi.

Lalganj Nagar Nigam has total administration over 6,339 houses to which it supplies basic amenities like water and sewerage.

It is also authorized to build roads within Nagar Nigam limits and impose taxes on properties coming under its jurisdiction.

Key Popular tourist places near to lalganj - Ashoka pillar, Buddha stupa or vishwa shanti stupa, Mahavir birth place, Vaishali garh, Vaishali lake, Raja Vishal fort and many other temples Lalganj has all the key public and private sector banks, malls, shopping complex, modern schools and basic hospitals with numbers of doctor clinics.

It is one of the growing nagar panchayat in bihar due to its agriculture income and hard working people throughout India and the world.

Due to its fertile land all the key major crops like wheat, maze, rice, tobacco, vegetables and moong are grown.