The study proposes that using a geographic information system (GIS) can effectively characterize the morphometric condition of the Teesta River catchment. Remote sensing (RS) satellites, specifically ALOS PALSAR and Landsat 8 OLI/TIRS, provide high-resolution imagery data to identify river basins and their stream networks. The Teesta River is a tributary of the Brahmaputra River, originating from two glacial lakes. The study focuses on conducting a detailed morphometric examination of the basin, which includes dividing it into nine sub-watersheds for calculating various morphometric parameters. Mathematical analysis is applied to factors such as flow direction, accumulations, stream length, order, drain density, bifurcation ratio, frequency, and circulatory ratio [2,3]. The drainage pattern within the 7,733.80 km2 basin is predominantly sub-dendritic to dendritic. The topography and geological composition of the area influence the flow order of streams within the catchment. The density of the studied area is 0.67 km2/km2, indicating it is a sixth-order basin. The research area has undergone a geomorphic stage, as evident from the increasing length ratio of streams from lower to higher orders.