Realist evaluation and Q Methodology are established approaches in social science. However, integration of Q methodology within a realist evaluation is scarce. This paper attempts to illustrate how Q methodology can support a realist evaluation. The paper attempts to capture the philosophical compatibility of the two approaches creating an argument for Q’s integration within realist evaluation. Through the case study selected the iterative methodological process is presented, capturing a snapshot of the findings from the evaluation. This illuminates how Q met (...) the philosophical aims of a realist evaluation to make sense of how and why and under what circumstances a programme or intervention works. It is argued that Q methodology is entirely suitable for capturing the three key stages in a realist evaluation of developing, testing, and refining programme theory. It is intended that this paper can contribute to inspire other realist evaluators and methodologists to make use of Q as a tool in their evaluation. (shrink)