This study aimed to investigate the effect of learning style (visual, auditory, kinesthetic) on the academic achievement of students at four Islamic State Institutions in South Sulawesi: Alauddin Makassar Islamic State University, Pare-pare Islamic State Institute, Palopo Islamic State Institute, and Watampone Islamic State Institute. Employing an ex post facto quantitative research design, a stratified random sample of 382 students was selected for the study. Data on learning styles were collected using a validated scale based on DePorter & Hernacky's theory. Data analysis used non-parametric statistics of the Kruskal-Wallis type. Descriptive and inferential statistical analyses examined the relationship between learning style and academic achievement. Results indicated that while visual learning styles with a sig value of 0.685 and kinesthetic learning styles with a sig value of 0.544 were not significantly correlated with academic performance (p > 0.05), auditory learning style was found to be a significant predictor of student success with a sig value of 0.047 (p < 0.05). Based on these findings, it is recommended that lecture-based methods, which cater to auditory learners, be prioritized in instructional strategies to enhance academic outcomes for students at these institutions.