The purpose of the present study was to reveal how demographic characteristics influence the perceptions of bank employees of organizational culture. The sample of the study consisted of 240 employees from Greek banking institutions, from different occupational positions. 60% of the employees were 31-40 years old followed by the categories 41-50 years old (20%), up to 30 years old (10%) and 51-60 years old (10%). Most of the employees (63.8%) had been working as bank employees for 6-15 years and the majority of them (63.8%) had been working in the same bank for 6-15 years. The majority of the employees (59.6%) were simple clerks, 29.2% were supervisors and 11.3% were Managers or Assistant Managers. The assessment of organizational culture was performed with the Organizational Culture Assessment Instrument (OCAI) developed by Cameron and Quinn (2006). Results indicate that there is a significant difference in the perceptions of the subjects between the dominant current and the dominant preferred type of organizational culture. In addition, a statistically significant difference (p<0.01) was found between Managers and clerks on the one hand and Supervisors on the other hand in terms of both the dominant current and the dominant preferred type of organizational culture. Finally, employees' perceptions of the dominant current and the dominant preferred type of organizational culture were found to be affected by other demographical characteristics, like