This research has the objectives to explore the influence of service quality, school reputation, and student achievement on student loyalty at an Islamic Junior High School in Karawang, by student satisfaction serving as a moderating factor. The research utilized a sample of 111 participants, specifically students from Islamic Junior High School in Karawang. The purposive sampling method was utilized for participant selection. The research adopts a field research approach by a quantitative emphasis. The primary data was gathered using questionnaires completed by the participants. The research has the objectives to assess how service quality, school reputation, and academic achievement influence student loyalty at an Islamic Junior High School in Karawang, considering student satisfaction as a moderating factor. A cohort of 111 students from an Islamic Junior High School in Karawang were chosen as participants using purposive sampling methods. The analysis methods utilized in this research are multiple linear regression, Moderating Regression Analysis (MRA), determination coefficient (Adjusted R2) and F test. The outcomes revealed that the adjusted coefficient of determination (R2) in the regression model was 0.573, signifying that the variability in service quality factors, school reputation, and academic performance can account for 57.3% of the variance in student loyalty factors. Furthermore, the adjusted R2 score in the regression model increased to 0.646, or 64.6%, following the introduction of the moderating variable. According to the outcomes of the F-test, the F-table score stands at 2.47 by a significance level of 5% (0.05). The calculated F-score of 50.113 surpasses the threshold of 2.47 at a significance level of 0.05, showing that the combined effects of service quality, school image, and academic performance have a considerable influence on student loyalty by the moderation model, the F-test outcome of 29.669 exceeds the critical score of 2.11 at a significance level of 0.05, suggesting that service quality, school image, and student achievement, when moderated by student satisfaction, significantly effect student loyalty. Keywords: Service Quality, School Image, Student Achievement, Student Loyalty, Student Satisfaction.