Visitors to public science events (PSEs) often report gains in scientific knowledge, improved attitudes toward science, and a greater awareness of science in everyday life (Jensen & Buckley, 2012; Adhikari et al., 2019; Boyette & Ramsey, 2019). However, these visitors disproportionately come from white, well-educated backgrounds (Bultitude, 2014; Kennedy et al., 2018; Adhikari et al., 2019; Nielsen et al., 2019). This paper utilizes a science capital framework to analyze the differential patterns of participation among PSE audiences. Quantitative analysis approaches are used to explore the kinds of science capital that visitors bring to PSEs, how the science capital of audiences differs between events, and how science capital might predict future participation in PSEs. Results reveal that PSE visitors typically have high pre-existing levels of science capital and that those with high levels of science capital are more likely to express interest in attending future PSEs. Directions for future research and practice are discussed.