This study investigates the knowledge, attitudes, and practices of the Lebanese population regarding thermal burns to inform targeted interventions. Using a cross-sectional design, data was collected from 1090 participants though a structured questionnaire. Key findings revealed a mean knowledge score of 14.89/20, indicating moderate understanding, with gaps in identifying third-degree burns and optimal cooling durations. Attitudes scores averaged 36.97/50, reflecting a strong support for burn prevention but low confidence in first aid. Practices scored 12.37/20, with many participants adhering to safety measures but relying on unverified remedies and lacking emergency preparedness. Significant correlations were found between the three domains, particularly between knowledge and practices (r = 0.328, p < 0.001), emphasising the role of education and attitudes in shaping behaviours. Multivariate analysis identified formal first aid training, education, and urban residency as strong predictors across all three domains, while older age negatively influenced knowledge. These results underscore the need for culturally tailored education and enhanced training to address gaps in burn prevention and management among the Lebanese population.