Nijgadh, is a town and municipality in Nepal, located in Bara District of the Madhesh Province. The total area of the municipality is 289.4 sq. km. The municipality was formed on 8 May 2014 by merging Nijgadh VDC with Ratnapuri VDC and Bharatganj Singaul VDC.

Bara District is one of the seventy–seven districts of Nepal, located in the western part of the Madhesh Province. The district is third richest district in Nepal after Kathmandu and Morang with 3.3% share of total GDP of Nepal and highest per capita income in Madhesh province. Kalaiya serves as the district's headquarter. Bakaiya, Jamuniya, Pasaha, Dudhaura and Bangari are the main rivers of Bara. The main languages spoken in the district are Bhojpuri, Bajjika, Tharu and Nepali.