Educational quality in vocational high schools (SMKs) is a crucial indicator in producing competent graduates who are able to respond to the challenges of the Industrial Revolution 4.0 and Society 5.0. Educational quality is influenced not only by academic factors but also by managerial and organizational aspects, particularly principal leadership, school climate, and organizational culture. This study aims to analyze the relationships between principal leadership, school climate, organizational culture, and educational quality at SMK As-Siddiq. A quantitative correlational research design was employed. The study involved all 28 teachers as respondents using a saturated sampling technique. Data were collected through validated and reliable Likert-scale questionnaires and analyzed using descriptive statistics, Pearson correlation, and multiple linear regression. The findings reveal that principal leadership, school climate, and organizational culture each have a positive and significant relationship with educational quality. Among these variables, principal leadership demonstrates the strongest relationship. Simultaneously, the three independent variables significantly explain educational quality, with a coefficient of determination of 65.9%, while the remaining variance is influenced by other factors beyond the research model. These findings indicate that improving educational quality requires an integrated strategy by strengthening principal leadership, creating a positive school climate, and fostering an adaptive organizational culture. The study provides empirical evidence that may serve as a reference for school management practices and educational policy aimed at sustainable quality improvement.
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