Post-harvest food loss poses a significant challenge to achieving food security in Nigeria, with substantial amounts of vegetables, grains, and tubers lost, impacting both national food security and the economic welfare of farmers and households. This study focuses on the nature and impact of post-harvest losses in North-East Nigeria, specifically in Wukari, Takum, and Gassol in Taraba State and Lamurde in Adamawa State. Observed post-harvest losses include rot in yam, theft, and grazing on maize, with crises causing farmers to abandon crops. Data collected through questionnaires were analyzed using descriptive statistics and Structural Equation Modeling (SEM), chosen for its ability to analyze complex variable relationships. Results show a 0.688 coefficient for household food shortage and 0.846 for income decline, indicating that post-harvest losses significantly increase food shortages and reduce household income. The R² value of 0.92 demonstrates that post-harvest losses account for 92% of these impacts, all statistically significant with p-values < 0.05. Recommendations include organizing peace treaties to reduce conflict-related food losses and conducting workshops on improved harvesting, processing, and storage techniques.