The Oxford Handbook of American and British Women Philosophers in the Nineteenth Century disrupts the widespread impression that there were no women philosophers in this period. Building on feminist histories of philosophy that cover other eras, this volume includes chapters on a wide range of women philosophers: those who wrote explicitly philosophical texts for academic audiences, others who philosophized in novels or pamphlets, and still others who philosophized through journalism or activist writings. Through fifty newly commissioned chapters, it examines the philosophical thought of individual women, including women of color, as well as chronicling women's contributions to philosophical movements such as Romanticism, Utilitarianism, Idealism, and Positivism. It also traces the philosophical arguments women used to contribute to topics in social philosophy such as socialism, feminism, abolitionism, and the philosophy of education. It outlines the history of writing and publishing in the nineteenth century, showing that circumstances were more hospitable to women authors during this time than is often assumed. It clarifies ways in which race and class affected women's philosophizing and analyzes the influence of women philosophers on their male contemporaries. By chronicling this wealth of women's philosophy, this handbook corrects the philosophical record and enriches our understanding of philosophy. If we assume there are no women philosophers in the nineteenth century, we will not look for them; if we do not look for them, they will remain obscure, limiting our understanding of what philosophy is and can be.