Research evidence suggests that strengthening the cultural roots of an organisation (Organisational Culture) can lead to the observance of increased behaviours that goes beyond the call of duty (Organisational Citizenship Behaviour) across all sectors within a given organisation. Organisational cultures that encourage innovation, sense of togetherness and positive competition, are ideal in encouraging employees to perform beyond normal expectations in organisations. Organisational culture is therefore a critical element that contributes to organisational success and effectiveness. The focus of this study is to determine the impact that the organisational culture of the South African Police Service, as an organisation, has on the Organisational Citizenship Behaviour of its members in the Western Cape. The empirical study involved the participation of 127 respondents from three of the largest police stations in the Western Cape.