This study aimed to develop and pilot a questionnaire to determine the ways in which working in a UK public library system can impact the well-being of those deployed in the sector. The methodological framework was based on an approach used to evaluate the well-being of patients in a clinical setting. Based on the responses of 466 employees, the results identified eight dimensions of library worker well-being; organizational, advancement, job design aspects, physical health, psychological health, interpersonal relationships, workload and facilities. Analyses indicated that organizational aspects most impaired well-being and longer-serving employees were worst affected. The findings offer a new, evidence-based perspective on the well-being issues that public library workers perceive to be most important and challenge earlier claims regarding stress and burnout. Also considered is the relevance of employer-sponsored wellness programmes where improvement in organizational performance is the prime reason behind provision. (Contains 9 tables and 1 figure.)