Elevations in the study area were classified into five flood susceptibility classes: very high (2,701–3,324 m), high (2,201–2,700 m), medium (1,901–2,200 m), low (1,601–1,900 m), and very low (1,174–11,600 m) (Figure 3(a)). Table 3 indicated that the lowest elevation (1,174–1,600 m) covers an area of 1,609.4 km² (28.6%) and the highest elevation (2,701–3,324) covered an area of 208.8 km² (3.6%). Flood affected the dwellers living near to the outlet of the Bilate catchment. The lowest elevation class had a very high flood susceptibility classification, while the highest elevation class had a very low flood susceptibility classification. Previous studies neglected flood susceptibility mapping in the Bilate catchment (Nannawo et al. 2021; Orke & Li 2021; Edamo et al. 2022a, 2022b, 2022c). This study plays a great role in flood risk management.