Abstract:Background: The varying levels of teacher morale in elementary schools are particularlynoteworthy, as they are closely linked not only to students’ engagement, behavior, and academicachievement, but also to teachers’ job satisfaction and emotional well-being.Objective: This study aimed to examine the influence of school principals’ leadership on teachermorale in Catholic elementary schools in Merauke, South Papua, Indonesia.Method: We employed a quantitative survey research approach to obtain data from 95 Catholicelementary school teachers in Merauke, South Papua, Indonesia. Obtained data were subjected tostatistical analysis using simple linear regression analysis by employing Statistical Package forthe Social Sciences version 21.Findings: The results of data analysis reveal a positive and significant impact of school principalleadership on the morale of Catholic elementary school teachers in Merauke, South Papua,Indonesia.Implication for Practice and Research: This finding implies that effective leadership practicesby school principals play a crucial role in fostering teachers’ motivation, satisfaction, and overallwell-being, which may in turn enhance the quality of teaching and learning in Catholicelementary schools.