The mountain terrains of the Sikkim Himalaya are geologically fragile and highly vulnerable to landslide hazards. This hazard has become a regular phenomenon during every monsoon season and earthquake events. The study focuses on assessing the landslide hazard and their characteristics. The hazard assessment was done through hazard zonation following the Bureau of Indian Standards (BIS in Criteria for earthquake resistant design of structures: general provisions and buildings 2002) guidelines, and the characterization of landslides was done by identifying the nature of the movement, materials, area, activity, and their association with land use/land cover and rainfall. Landslide points were collected through field surveys and the Geological Survey of India’s report. Landslides hazard zonation mapping was done considering seven geo-environmental parameters. These spatial layers were integrated with the GIS using overlay techniques. It was observed that the landslide hazard map shows that very high and high-hazard areas are mainly found in the southern part of the district. The highest incidence of landslide per km2 is recorded for the very high-hazard zone (73.67%). Characterization of landslides in the district shows that rock fall and sliding are the main mechanisms of movement and they are small to medium in size. Landslides are found even in dense forest areas which indicate the dominant control of geological structures in landslide occurrences.