Natural disasters often have adverse impacts on society and pose significant threats, particularly in Indonesia, where landslides are prevalent. West Lampung Regency, located in Lampung Province, has a high susceptibility to landslides due to its steep slopes (>20%) covering 45.85% of the area and the presence of Andosol soil, which is prone to erosion. This vulnerability is exacerbated by annual rainfall exceeding 2,500 mm. To address these risks, mapping landslide-prone areas is essential for disaster mitigation. This study employed a Geographic Information System (GIS) and the weighted overlay technique to analyze three key parameters: rock type, slope gradient, and rainfall intensity. The analysis was integrated with direct field observations at selected locations. The resulting landslide vulnerability map categorizes the region into four classes: low (13,124.72 ha), medium (78,070.44 ha), high (91,854.2 ha), and very high (8,953.07 ha). Field observations in Suoh sub-district identified five landslide points, predominantly located in areas classified as medium to high vulnerability. These findings highlight the critical role of slope steepness (>20%) in triggering landslides. This study provides a comprehensive framework for assessing landslide hazards and supports the development of effective mitigation strategies to reduce risks in West Lampung Regency.