This dissertation presents three unique and complementary studies aimed at integrating the mental health stigma literature over time and across disciplines. Chapter 1 describes the overall theoretical and measurement landscape of mental health stigma, arguing for unified theorizing, consistent measurement, and replicable work. Chapter 2 presents an umbrella review that reveals the widespread presence of stigma within a constellation of factors that influence help-seeking and utilization of mental healthcare services. Using an established framework, I organize intrapersonal (n = 37), interpersonal (n = 14), institutional (n = 9), community (n = 7), and public policy (n = 6) factors, identifying stigma as a widely referenced and multi-level factor. This braids mental health stigma into a broader literature on healthcare utilization. Chapter 3 targets measurement. Using quantitative and qualitative data (n = 749), I refine existing knowledge of a widely cited public stigma scale — the Community Attitudes Towards Mental Illness Scale. Confirmatory factor analysis supports a modified version of Morris' (2012) structure — fear/exclusion, social control, and goodwill. Even though the scale is designed to measure stigma towards mental health in general, most participants (73.6%) considered specific conditions when completing the scale, with bipolar disorder, depression, and schizophrenia most common. Chapter 4 highlights the importance of replicable work that examines stigma over time. Drawing on data from an experimental vignette study conducted across three waves of the General Social Survey (1996, 2006, 2018; Total N = 2448) and a new experiment (n = 791) that I conducted, this chapter demonstrates that perceptions of danger explain a substantial portion of the relationship between mental health conditions and desire for distance. I show that this link did not change over time (Study 1), was elicited by diagnoses alone while holding target behavior constant (Study 2), and predicted stigma towards schizophrenia more strongly than towards depression (Studies 1 and 2). Chapter 5 concludes by summarizing all chapters, discussing theoretical and applied considerations for an integrative theory of stigma, and touching on future directions for contributing to this vision.