In many high-income countries today, scholarly interest in the politics of class has coincided with growing economic inequality, rising support for nonmainstream political parties and candidates, and increasing flows of immigration. We review social science research on the views of different class segments vis-à-vis economic, political, and sociocultural issues, finding greater scholarly attention to the interdependence of economic, social, and political concerns and preferences than arguably was the case even a few years ago. Our main aim is to synthesize and critically evaluate this rapidly expanding literature, but we also provide empirical data on class differences and similarities in political opinion across 18 countries, and we pinpoint several areas of research that are in need of further empirical, methodological, and theoretical inquiry. Expected final online publication date for the Annual Review of Sociology, Volume 46 is July 30, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.