US Census
Texas County Population
The Rich Men North of Richmond (Median Household Income)
I'd say they probably live in either Fairfax County VA or Bethesda CDP, MD.
For those playing along at home, here is the code for making this map up and interpolating the missing data: https://github.com/AndyArthur/r_maps_and_graphs/blob/main/Richmen North of Richmond Map.R
Census Tracts in America with Fewer then 100 People Per Square Mile
Albany Population Density
From the 2020 Census data, block level data.
Metro Areas in New York
The Census Bureau has Albany-Schenectady-Troy as the 4th largest metropolitan area in New York, while Syracuse is only the 6th largest metropolitan area, with Poughkeepsie-Newburgh in the 5th place.