Abstract: The purpose of this study was to explore the association between religiosity, mental health and self-esteem among a sample of 143 Muslim Bruneian students (43 males, 100 females) from Universiti Brunei Darussalam (UBD). All participants completed) the religiosity scale, the Mental Health Inventory (MHI) and the Rosenberg Self-Esteem Scale (RSES). Female participants scored significantly higher than the male subjects on the measure of religiosity scale however the effect size is small. No other gender-related differences were detected on all the scales. There is also no age-related differences across all the scales. Correlations were significant between religiosity and the psychological well-being component of MHI and RSES but not with the psychological distress component of MHI. Psychological distress is negatively correlated with psychological well-being and RSES. While Psychological well-being is positively correlated with RSES. Implications of the findings are discussed and mixed-methods research was recommended.