Class is one of the most important, widely used, and complicated concepts in human geography and the social sciences. It underpins economic geographies and intersects with geographies of gender, race, and sexuality. Different notions of class have been in use, along the spectrum from neoclassical to Marxist economic theories. These theories have also been reworked by feminist, postcolonial, and poststructuralist scholars in order to augment critiques of class-related inequalities and to construct possibilities for imagining and producing progressive geographies of class. The contemporary global and neoliberal economy has given rise to high levels of concentration of wealth and economic insecurity that cut across the class divisions and social safety nets of the twentieth century. The politics of class remains central, however; imagining new horizons in class solidarity and transformation is as vital as ever for new and diverse class subjects.