The purpose of this thesis is to examine the historical membership patterns of the Boy Scouts of America (BSA) on a regional and council scale. Using Annual Report data, maps were created to show membership patterns within the BSA’s 12 regions, and over 300 councils when available. The examination of maps reveals the membership impacts of internal and external policy changes upon the Boy Scouts of America. The maps also show how American cultural shifts have impacted the BSA. After reviewing this thesis, the reader should have a greater understanding of the creation, growth, dispersion, and eventual decline in membership of the Boy Scouts of America. Due to the popularity of the organization, and its long history, the reader may also glean some information about American culture in the 20th century as viewed through the lens of the BSA’s rise and fall in popularity.