Alfalfa County's population was primarily of European-American ancestry. European immigrants and their children were numerous in the early 1900s. Germans from Russia (ethnic Germans who immigrated to American from Russia), many of whom were Mennonites, settled near Ingersoll, Driftwood, Cherokee, and Goltry. Early censuses also reveal a considerable number of Bohemians from the Austro-Hungary Empire. At the turn of the twenty-first century, nearly 17 percent of county residents claimed German ancestry on the census. One Mennonite church (in Goltry) remained .