On the same theme, here’s a map of the mean global centre of population. Strictly speaking it should be deep inside the Earth somewhere, and confusingly locates to different points on a flat map depending on projection.
This map based on the WGS84 reference ellipsoid, and population info from the 2008 CIA World Factbook locates it (in blue) in northern South Asia. And the corresponding antipodal point – the place on average, furthest from the world’s population – in the Southern Pacific.
Image by Brhaspati, Creative Commons Attribution-Share Alike 3.0 license.