Personality and cognitive ability are two of the most consequential domains of human individuality. More than 100 years of research has examined the links between these domains, and yet most ability-personality relations remain unknown. This project quantitatively synthesizes 1,325 studies including millions of individuals from more than 50 countries. The dataset and codebook for this project are available on Open Science Framework. If you are not able to access via the Open Science Framework, the data are also available in the Data Repository for the University of Minnesota (https://doi.org/10.13020/7YS8-ET75). The database is the result of five years working with a research team to amass as many effect sizes describing the relations between personality traits and cognitive abilities as we could find. This effort involved scanning thousands of pages; partnering with dozens of librarians, researchers, companies, and translators around the world; and entering, consistentizing, and checking millions of database values. Multiple sources of information, including troves of publicly available unpublished data, were utilized to minimize file drawer biases. The sources included were identified through electronic literature searches; liaising with investigators working on relevant research or applications; and systematic searches for grey sources such as dissertations, grant-funded studies, psychological test manuals, and large technical databases from applied settings (e.g., armed services of various nations, corporate employee selection programs). Citations for all materials can be found in the Supplementary Materials (“References for Studies Included in the Meta-Analyses”) on Open Science Framework. Each sample was carefully inspected to ensure independence, but this task was challenging since many studies did not adequately report if their study overlapped with other reports. Meta-Analysis Sample ID assigns a unique ID to each sample we believed was truly independent of others included in this meta-analytic database. Some values in the database show as "<Not Reported>" because the original material did not clearly indicate the value (e.g., country of the participants). In other cases, the correct value was unclear (e.g., some authors referred to a personality scale by a different name or not all pages of the original material could be obtained or read). Mappings of personality and cognitive ability measures to respective constructs was done according to Stanek and Ones (2018) and was based on examination of multiple lines of evidence where possible for accurate nomological net clustering (Hough, Oswald, & Ock, 2015) (e.g., convergent and divergent validities, item content, scale descriptions). Similar work has been done to explore the relations between constructs across measures (Schwaba, Rhemtulla, Hopwood, & Bleidorn, 2020), but Stanek and Ones (2018) is the most comprehensive examination across samples. Dashes indicate different levels of the construct hierarchy with high-level constructs listed first. For example, Acquired Knowledge--Domain Specific Knowledge---Sciences----Life Sciences Knowledge indicates the lineage of the Life Sciences Knowledge construct, which is within the broader Sciences construct, which is within the broader Domain Specific Knowledge construct, which is within the broader Acquired Knowledge construct. In the original sources some measures were scored in the opposite direction of the Stanek & Ones (2018) constructs. Effect sizes from such measures required reversal in order to be included in the current meta-analytic database. We noted such instances for cognitive ability and personality measures separately since one or both might require reversal of the effect size sign. Unique Row ID was left in to provide an ID for each row regardless of user edits (e.g., sorting). References Hough, L. M., Oswald, F. L., & Ock, J. (2015). Beyond the Big Five: New directions for personality research and practice in organizations. Annual Review of Organizational Psychology and Organizational Behavior, 2(1), 183–209. Schwaba, T., Rhemtulla, M., Hopwood, C. J., & Bleidorn, W. (2020). A facet atlas: Visualizing networks that describe the blends, cores, and peripheries of personality structure. Plos One, 15(7), e0236893. Stanek, K. C., & Ones, D. S. (2018). Taxonomies and compendia of cognitive ability and personality constructs and measures relevant to industrial, work and organizational psychology. In D. S. Ones, C. Anderson, C. Viswesvaran, & H. K. Sinangil (Eds.), The SAGE handbook of industrial, work & organizational psychology: Personnel psychology and employee performance (pp. 366–407). Sage.