This research aims to analyse the personality traits of social workers in different areas of social work using the NEO-FFI questionnaire, one of the most widely used instruments for measuring the five main personality dimensions. Although this instrument is commonly used in psychological research, no studies are available to date that examine the personality structure of social workers using the NEO-FFI. This study, therefore, represents an innovative approach to understanding how personality traits (neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness) influence performance and satisfaction in this demanding profession. The results show statistically significant differences in personality traits between social workers and the general population, while the type of social service provided and the age group of clients do not have a statistically significant effect on these results. This study provides new insights into the personality profile of social workers, which may have practical implications for selection, education, and professional development in this field.