Abstract Background Despite sustained improvements in life expectancy and health during past decades, substantial health inequalities persist. Subnational jurisdictions are increasingly recognised for their pivotal role in addressing health inequalities. While data dashboards offer a promising solution for monitoring health inequalities, their utilisation in supporting local policies to reduce inequalities remains largely unexplored. This study examines the utilisation of health equity data and data dashboards (i.e. Sotkanet, Sotekuva, Tietotarjotin and Hyvinvointivajemittaristo) for health policy-making in Finnish wellbeing services counties, identifies barriers in using existing dashboards and determines the data needs for improved health inequalities monitoring. Methods A qualitative case study design with reflexive thematic analysis will be used. The study will be pre-registered in the OSF framework. Semi-structured interviews will be conducted with policy-makers involved in health policy development. Data analysis will involve open and axial coding to identify themes in participants’ responses. Themes will be organised into a coding framework, and the analysis will continue iteratively until data saturation is achieved. The study will include a pre-approved interview guide and peer debriefing sessions. Findings will be reported according to the Consolidated criteria for reporting qualitative research (COREQ) guidelines, with thematic diagrams illustrating key themes and sub-themes. The study is expected to reveal varying levels of utilisation of data and data dashboards among local policymakers, along with specific challenges and gaps in their current use. Policymakers may express needs for additional data or new features in dashboards to better monitor health inequalities. The study will conclude with recommendations for improvements in current data dashboards. Work is under development but by funders requirement the results will be ready by November 2024. Key messages • Data dashboards offer a promising solution for monitoring health inequalities, but their utilisation in supporting local policies to reduce inequalities remains largely unexplored. • This study examines the utilisation of data dashboards for health policy-making subnationally, identifies barriers for use and determines the data needs for improved health inequalities monitoring.