The aim of our research was to identify an easy-to-administer instrument for evaluating wellbeing in an at-risk population of young internal displaced people and young refugees in sub-Saharan Africa (N = 462). To this end, we adapted the French-language 17-item version of the Subjective Wellbeing Assessment Scale (SWBAS-French version) and evaluated its factor structure, using a combination of exploratory factor analysis and confirmatory factor analysis. We observed five underlying factors (positive functioning, negative functioning, human insecurity, school domain, and social domain) and 17 items. Participants' scores on the positive functioning, negative functioning, and social domain subscales were associated with their levels of psychological distress, and the statistical outcomes provided support for practical adoption of the instrument. The SWBAS-17F may, therefore, represent user-friendly instruments that practitioners might use alongside adaptations of more traditional diagnostic tools to obtain a complete and holistic assessment of refugees, asylum seekers, and internally displaced people.