@wildgrass saidOnly if you exclude places that are expensive.
People are rich everywhere. But...
Stafford, Loundon, and Fairfax County, Virginia are the three richest areas of the entire country.
Is it a coincidence that they're all in the DC beltway?
https://www.kiplinger.com/real-estate/603232/the-real-richest-counties-in-the-us
But even if you ignore cost of living Virginia still has the wealthiest citizens by far beating out CA and NY easily so your point stands.