This study investigated the influence of perceived organizational justice, organizational commitment and trust in manager as predictors of organizational citizenship behaviour among bank employees. Essentially, the issue of organizational justice, trust in managers and organizational commitment are subjects of interest in organizational behaviour and human resource management and as such this could be investigated in the banking industry in order to assess how they influence organizational citizenship behaviour. The study was a survey which employed Ex-Post Factor design. The design was found appropriate because the variables of interest were already in existence in the study area. Data was collected from 186 respondents. Using a structured questionnaire collected data were analysed using the inferential and descriptive statistics of the Statistical Package for Social Sciences (SPSS) version 21. The result revealed that perceived organizational justice was significantly and positively related to organizational citizenship behaviour [r(184)=.51** P<.01]; organizational commitment was significantly and positively related to organizational citizenship behaviour among bank employees [r(184)=.48**, P<.01]; trust in managers was significantly and positively related to organizational citizenship behaviour among bank employees [t(184)=.36**, P<.0.1]; perceived interactional justice was significantly and positively related to organizational citizenship behaviour (t184=6.37<.05]; perceived procedural justice was significantly and positively related to organizational citizenship behaviour {t(184)=.30**, P<.01]; perceived distributive justice was significantly and positively related to organizational citizenship behaviour among bank employees {r(184)=.43**, P<.01). Finally, the findings revealed that the predictor variables (perceived organizational justice, organizational commitment and trust in manager) showed significantly independent and joint prediction of organizational citizenship behavior among bank employees {F=78.74, P<.05, R2=.56.12}. It was concluded that organizational justice, trust in manager and organizational commitment significantly were significantly related to organizational citizenship behaviour among bank employees respectively and jointly. It was therefore recommended that organizational citizenship behavior should be more encouraged in the banking industry and other allied industries.