A scoping review was conducted to investigate which variables predict psychologists' job satisfaction the most, across different fields of psychology. The aim was also to determine which predictors and instruments were used most frequently for the assessment of job satisfaction among psychologists. Data search for inclusion in the scoping review was limited to quantitative empirical studies that involved the measurement of job satisfaction of practicing psychologists. Literature searches were made in November of 2023. The information search was systematically performed from the inception of electronic bibliographic databases Web of Science (WoS) and PubMed. All retrieved articles were exported to the Zotero reference manager and deduplicated, followed by screening performed by two independent reviewers, which resulted in a total of 38 articles being eligible for our analysis. A comprehensive data extraction and assessment tool was developed in Excel to assess the characteristics of the included studies. We used the Joanna Briggs Critical Appraisal Tool (CAT) (https://jbi.global/critical-appraisal-tools) to assess the methodological qualities of studies that were included in this research. Results of this study have shown that, across all fields of psychology, job satisfaction levels are most frequently predicted with variables concerning work environment and support. Results imply that psychologists' better communication with and integration among colleagues and superiors was associated with higher satisfaction with their jobs. Conversely, shifts in the work environment, such as increases in technology use and training modifications, as well as workplaces exposed to a higher number of clients have been associated with lower levels of job satisfaction. Furthermore, in the context of all psychological domains, except for clinical psychology, factors related to work environment and support have been most frequently used to assess levels of job satisfaction. In studies that focused on clinical psychologists, the most used factors for assessment of satisfaction have been those related to psychological factors, which encompass personal aspects such as psychological flexibility, self-efficacy, career-sustaining behaviors, and emotional demands. Additionally, our study reports a high diversity of instruments used to measure job satisfaction in different contexts, with a great number of articles reporting using non-validated measures. Our findings highlight the need for standardized, validated measures of job satisfaction which are tailored to specific psychological domains, to better the consistency and applicability of future research outcomes.