The Thirteenth Census of the United States was undertaken in 1910. Census enumerators found that on "census day"--April 15, 1910--Vienna was home to 949 inhabitants. Ohio's population stood at 4,767,121. The population of the United States was 92,228,496.
The United States Constitution requires that a population census be undertaken every ten years to determine the appropriation of seats in the United States House of Representatives and for the collection of taxes. The United States was the first nation to legislate a regularly held census.
For More Information
"1910 Overview." United States Census Bureau, Department of Commerce, Washington, DC.
"Instructions for Enumerators." Integrated Public Use Microdata Series, Minnesota Population Center, University of Minnesota, Minnesota, MN.