Map Guide to the U.S. Federal Censuses 1790–1920
The county has always been used as the basic Federal census unit. Genealogical research in the census, therefore, begins with identifying the correct county jurisdictions. Map Guide to the U.S. Federal Censuses 1790–1920 shows county outline maps across the United States at ten-year intervals. Effectively, a map of each state’s county lines at the time [...]


















