The study aims to develop a composite index encompassing different dimensions of country brands, facilitating longitudinal comparisons and dimension-specific analyses. Methodologically, it follows a multi-step process involving data collection, dimension weighting, and aggregation, aligning with established procedures for composite index construction. By integrating key indicators from several well-known reports and rankings, the methodology offers a standardized approach applicable to evaluating and tracking brand perceptions for various countries. Results demonstrate the unidimensionality and reliability of the proposed dimensions for country brand, as well as the nomological validity of the composite index. Notably, correlation analysis confirms the index’s nomological validity by establishing a significant relationship with countries’ image and reputation perceptions. This research contributes to advancing understanding and measurement methodologies in country branding, offering a comprehensive index to facilitate nuanced assessments of country brand dynamics and inform decision-making for policymakers, businesses, and stakeholders globally.