ABSTRACT The study was a cross-sectional design to investigate psychological ownership and organisational trust as predictors of organisational citizenship behaviour (OCB) among bank workers to increase the understanding of the ability of psychological ownership and organisational trust to predict citizenship behaviours in organizations. The following hypotheses were stated: that psychological ownership will not significantly predict organisational citizenship behaviour of Bank workers and that organisational trust will not significantly predict organisational citizenship behaviour of Bank workers. Two hundred and three (203) Bank workers from five Nigeria financial Banks located in Nsukka in Enugu state were sampled. Those Banks include: Access Bank, Diamond Bank, Eco Bank, U B A, and Fidelity Bank. All the participants were adults, with the age range of 19-47 years and mean age of 33. The participants volunteered to take part in the study. Three instruments (Organisational Citizenship Behaviour Scale (OCBS), Psychological Ownership Questionnaire (POQ), and Organizational Trust Index (OTI) were used in the study. Multiple regression analysis was used for data analysis and the results indicated that psychological ownership and organisational trust significantly predicted organisational citizenship behaviour of Bank workers (β = 0.173, p< 0.05; & β = 0.372, p< 0.001) respectively. Limitations of the study and recommendations for further research were also included in the study.
