Digital Elevation Model (DEM) is a digital representation of the Earth’s surface topography. It provides information about the elevation or height of the terrain at various locations. DEMs are extensively used in various fields such as geography, environmental studies for slope analysis, watershed delineation, and visualization of landscape feature. There are various open-source DEMs available, providing access to elevation data for different regions across the globe. This study presents a detailed analysis of DEMs to assess catchment characteristics and stream networks in a watershed of Aandhi village, Rajasthan, India. Four DEMs (ASTER, ALOS PALSAR, CARTOSAT, SRTM) from different sources were used with a constant threshold of flow accumulation to generate watershed and stream network data. Comparative analysis of calculated catchment areas, stream orders and morphological parameters revealed significant impacts of DEM source and resolution on the resulting watershed and stream network. The results of this study shows that ALOS PALSAR with 12.5 m resolution, provided the most detailed outcomes for study area watershed. The findings emphasize the importance of selecting appropriate DEMs to accurately represent flow patterns, drainage characteristics, and catchment areas of surrounding streams. Consideration of DEM resolution and accuracy is crucial for similar type of watershed for detailed hydrological and water resource management studies.