In this article, we present a new version of the Questionnaire God Representations (QGR), the QGR-17. This version is particularly aimed for use in scientific studies among psychiatric patients and applications in a clinical context, such as routine outcome measurement and the monitoring of existential recovery during treatment. We calculated norm scores and examined psychometric properties of the QGR-17, for both a general population and a population of people who receive mental health care. We calculated norm scores (based on stanine scores) and analyzed internal consistency, comparative and structural validity (Study 1, N = 1,788). Convergent and divergent validity were examined with correlation analyses with psychopathology, vitality and hope/meaning in life, and identity as existential factors (Study 2, N = 1,366). The results show that internal consistencies of the QGR-17 scales are adequate to good and that it has structural validity. The average item scores of each QGR-17 scale resemble the scales of the total QGR. We found that the positively valenced aspects of God representations were predominantly related to higher levels of vitality and the existential constructs of identity and hope/meaning in life, while the negatively valenced aspects were related to higher levels of psychopathology, less hope/meaning in life, and more negative identity scores. Taken together, these findings provide support for the QGR-17 as a relatively brief measure of God representations and its potential to address the positive or negative relationships of religion/spirituality with mental health in treatment. Implications for clinical work are discussed.