Geographic center of the contiguous United States, Geographical center monument in Lebanon, Kansas, United States.

The geographic center of the contiguous United States is marked by a rectangular metal plaque with a blue-green patina, mounted against stone at the intersection of AA Road and K-191. The plaque bears the inscription "THE GEOGRAPHIC CENTER OF THE UNITED STATES" and coordinates 39°50′N 98°35′W, with an inset map and sponsor details. A U.S. flag usually flies from a pole on the monument, and a covered picnic area and the eight-pew U.S. Center Chapel are nearby.

In 1918 the U.S. Coast and Geodetic Survey fixed the center of the 48 contiguous states at 39°50′N 98°35′W by balancing a cardboard cutout shaped like the country. To protect the private landowner, a proxy plaque was set in 1940 about half a mile away at the AA Road and K-191 intersection, sponsored by the Lebanon Hub Club.

A small chapel called the United States Center Chapel stands a short walk from the marker and holds eight wooden benches. Travelers stop inside for a quiet moment after visiting the geographical midpoint.

To reach the marker, drive one mile north on US Highway 281, then turn west on K-191 until the paved road ends. The site is off the main routes, so plan extra time and bring water since there are no facilities.

The 1940 plaque is a proxy: the 1918 survey point lies about half a mile away on private land, so the marker was set at the AA Road and K-191 intersection to protect the owner's privacy. Its coordinates, 39°50' N and 98°35' W, are cast into the metal.