What is the USGS geographical center of the continental United States?
The center of the conterminous states (48 states) is at 39 degrees 50 minutes north, 98 degrees 35 minutes west, near Lebanon, Kansas. The center of the continental United States (49 states) is at 44 degrees 59 minutes north, 103 degrees 38 minutes west, near Castle Rock in Butte County, South Dakota. And the center of the entire United States (50 states) at 44 degrees 58 minutes north, 103 degrees 46 minutes west, which is a ways west of Castle Rock in Butte County, South Dakota.