The high turnover of nurses has become a global problem. Several studies have proposed that nurses’ perceptions of the ethical climate of their organization are related to higher job satisfaction and organizational commitment and thus lead to higher organizational citizenship behaviors. This study uses hierarchical regression to understand which types of ethical climate, facets of job satisfaction, and the three components of organizational commitment influence different dimensions of organizational citizenship behaviors. Questionnaires were distributed to 450 nurses, and 352 usable questionnaires were returned. The findings of the article suggest that hospitals can increase organizational citizenship behaviors by influencing an organization’s ethical climate, job satisfaction, and organizational commitment. Hospital administrators can foster within organizations, the climate types of caring, law and code and rules climate, satisfaction with coworkers, and affective commitment and normative commitment that increase organizational citizenship behavior, while preventing organizations from developing the type of instrumental climate and continuance commitment that decreases it.