Johnson's Cyclopaedia, Map Showing the Position of the Centre of Population at the Close of Each Decade from 1790 to 1890, 1896

Bain News Service, The Center of Population of U.S. [man standing next to memorial stone], Bain News Service, publisher [between ca. 1910 and ca. 1915]

U.S. Department of Commerce, Center of Population of the United States Pamphlet, c. 1970

Curt Teich Postcard Company, Greetings from Carlisle, IN, c. 1940

Unknown Photographer, Center of Population for 1920 (Men with Tree), c. 1920

AP Wire, Population Figures Estimated from the Last Census in 1960 - Watched by Workers in the Commerce Dept., Washington, D.C., 1970

United States Postal Service, Nation’s Population Center Postmark, 1971

Rikkaboy, Found This Outside the Courthouse, 2018

Unknown Photographer, Farm That is the Geographic Center of the US in 1921 near Spencer Indiana Owen County, 1921 (recto)

Unknown Photographer, Farm That is the Geographic Center of the US in 1921 near Spencer Indiana Owen County, 1921 (verso)

The Houston Chronicle, Mayor Ronald Watson in Front of Billboard, DeSoto, MO, 1984

AP Wire, John and Vickie Grieg with the Population Clock, c. 1970

Edgar Springs, Missouri, 2000