Abstract. The prevalence of counterproductive work behavior (CWB) does not only differ across industries but also varies signifi cantly according to sociodemographic characteristics. This study examines CWB and socio-demographic characteristics among selected employees in the Nigerian maritime industry. Causal research design was adopted to survey 1,000 employees selected through multistage sampling approach in three selected parastatals (Nigerian Ports Authority, Nigerian Maritime Administration and Safety Agency, and Nigerian Shippers Council). The data obtained were analyzed with ANOVA and t-test. Based on the analysis carried out, CWB was found to be signifi cantly related to gender, age, marital status, employee cadre, and income, while employees' level of educational attainment is not signifi cantly related to CWB. Based on the abovementioned fi ndings, the study concludes that the level of education is not signifi cantly connected to the employees' propensity towards CWB, while other socio-demographic variables are strongly associated to CWB in the workplace. The study recommends that management should develop a mechanism for identifying and selecting their potential employees as a guide against poor organizational fi t of employees and that of the organization. Likewise, effort should be intensifi ed to develop and improve organizational culture that will propel citizenship behavior in the workplace.