This study evaluates the liquefaction potential of sandy soils at a proposed power plant site in Mojokerto, East Java, to support seismic-resistant foundation design and ensure structural safety during earthquake events. Standard penetration test (SPT) data were analyzed using cyclic stress ratio (CSR) and cyclic resistance ratio (CRR) calculations to determine the factor of safety against liquefaction at various borehole locations. Three analytical methods were applied to calculate CRR values, namely the Ishihara method, the Yoshimi & Tokimatsu method, and the Boulanger & Idriss method, in addition to the Seed and Idriss method for CSR evaluation. The comparison of classical and modern approaches enhances the reliability of results. The findings indicate no liquefaction potential at boreholes B1, B2, B5, B6, and B7, but potential liquefaction at borehole B3 (depths 3–5 m) and borehole B4 (depths 0–3.5 m and 11–13 m). To mitigate these risks, ground improvement methods such as densification or deep soil mixing are recommended. This study contributes to site-specific seismic hazard assessment and provides practical recommendations for resilient energy infrastructure design in seismically active regions.