List of geographic centers of the United States
[2] The list given below has been only slightly modified since it was first produced by the U.S. Geological Survey (USGS) in the early 1920s."[7] An updated list of geographic centers using this definition (which is equivalent to the state's centroid) is given below.It was derived by minimizing the sum of squared great circle distances from all points of land in a state (including islands, but not coastal waters, following the earlier practice of the USGS).[8] The geographic center of the contiguous United States, determined in this way, is at 39°50.13′N 99°5.45′W / 39.83550°N 99.09083°W / 39.83550; -99.09083 (Geographic center of the Geographic center of the Contiguous United States); this is 5.4 miles (8.7 km) from Agra, Kansas, 5.7 miles (9.2 km) from Kensington, Kansas, and 26.9 great circle miles (43.3 km) west of the longstanding designated site near Lebanon, Kansas.[9] Similarly, the USGS does not include the territories in its list of geographic centers.