The GEOGRAPHIC CENTER of the UNITED STATES LAT. 39°50' LONG. −98°35' NE 1/4 – SE 1/4 – S32 – T2S – R11W
While those in DC and NYC will declare the United States the center of the world and each argue among themselves that their city is the center of the US, the actual center of the US (the lower 48) - and hence the world - sits out in north-central Kansas*. The marker is located about ½ mile from the actual site at the intersection of Aa Road and 130 Road a couple of miles NW of Lebanon.
Where it should be.
Have a seat on the bench and feel the world revolve around you ...
*The US Geodetic Survey determined the point in 1918 by cutting out a cardboard map of the US and balancing it on a pencil ... This marker - set in 1940 - is actually about ½ mile from the actual - more or less - location which is in the middle of a private field. If one considers Alaska and Hawaii (Alaska, yes; Hawaii, no), the point is up near the point where South Dakota, Wyoming, and Montana join.