The objective of this research was to find out grasshopper fauna of Udalguri District. A study on the fauna of grasshoppers was carried out from July 2022 to November 2023 at a number of locations within the Udalguri district of BTR, Assam. We classified a total of 424 collected specimens from the investigated locations into 19 genera and 19 species. It is possible to identify 19 species from 3 families. The specimen is classified under the following 3 families: Acrididae, Tettigoniidae and Pyrgomorphidae. This study revealed that, among the other families, the Acrididae family was the largest among other family. This study reveals that the area of Udalguri District is very much suitable for grasshopper fauna. This is the first research work carried out in this area on grasshoppers. This research will be considered the basis for further and future research.