<p>The liquefaction potential of soils is commonly evaluated using the Factor of Safety against Liquefaction (FS_L), which reflects susceptibility only at specific depths and is insufficient to predict the overall behaviour of the soil-column. Hence, this study employed the Liquefaction Potential Index (LPI) to comprehensively evaluate the liquefaction severity across Bihar, India. The LPIs were estimated using the methodology proposed by Luna and Frost in 1998, while FS_L was computed using deterministic approaches, specifically the IS:1893(Part 1) method, the Boulanger and Idriss method, and the Tokimatsu and Yoshimi method. The present analysis considers a range of earthquake magnitudes (M_w = 6.0–7.5) based on the seismic history of Bihar. Results indicated that the soils susceptible to liquefaction in Bihar occur up to an average critical depth of 6.3–6.6&#xa0;m below ground level. Furthermore, the study revealed that up to 81% of the districts in Bihar exhibit extreme liquefaction susceptibility for M_w = 7.5. This emphasizes the need for a detailed regional hazard assessment. The study classified Bihar into six liquefaction severity zones: none, low, moderate, high, very high, and extreme. Additionally, the hazard zonation and contour maps were presented, providing an insightful spatial representation of liquefaction hazards across Bihar.</p>