Purpose: This study aimed to investigate the relationship between teachers' perceptions on diversity perspectives in schools and their happiness at work (HAW) levels. Design/methodology/approach: A correlational survey model was used in the study, and the stratified sample consisted of 768 teachers in public high schools in a province in the west of Turkey. Findings: The result of hierarchical regression analysis showed that integration-and-learning, colour blindness and fairness diversity perspectives significantly predicted HAW. However, reinforcing homogeneity and access perspectives did not predict HAW. While positive affect, one of the dimensions of HAW, was predicted by integration-and-learning, colour blindness and fairness perspectives, negative affect was predicted by integration-and-learning and colour blindness perspectives. Moreover, fulfilment, the other dimension of HAW, was predicted by integration-and-learning and fairness perspectives. Originality/value: School administrators can use the findings to increase teacher happiness at schools, developing proactive diversity management perspectives.