Eugenics has a complicated history. In the United States and Britain biologists, psychiatrists, anthropologists, political theorists and others were involved in eugenic discussions. But historians of eugenics have all but neglected to tell the geographer's story. This thesis discusses the role of four geographers: Robert DeCourcy Ward, Ellsworth Huntington, Stephen Sargent Visher and Herbert John Fleure. My main contention is that not only did these geographers play active roles in the eugenics movement, but that they used geographical theories and methodologies to bolster their eugenic ideology. Ward, as a leader of the immigration restriction movement in the United States, presented geographical solutions to eugenic problems; Huntington was a vocal advocate of understanding race through a geographical lens; Visher forwarded the claim that intelligence had a particular geography; and Fleure was interested in the history of race and migrations. These case studies serve as detailed examples of how the history of geography and the history of eugenics have intertwined in both Britain and the United States.