This chapter provides an overview of scholarship examining the behavior and influence of women voters in United States history, from the fight for suffrage to the emergence of gender gaps in vote choice, voter preferences, and voter turnout. Dittmar exposes and explains gender differences between men and women voters, as well as among women, and discusses how those differences influence the electoral process. This chapter introduces subsequent chapters in the volume that analyze gender differences in specific issue areas such as guns and crime, abortion, and the role of government.