这是county 排名
The five richest counties in the U.S. (No. 1 being richest), based on our combination of factors, are:
- Falls Church, Virginia
- Loudoun County, Virginia
- San Mateo County, California
- Santa Clara County, California
- Marin County, California
The five richest counties in the U.S. (No. 1 being richest), based on our combination of factors, are: