Top 10 Wealthiest Counties in the USA 2025

 10. Arlington County, Virginia: $137,000

Wealthiest Counties in the USA 

 9. Nassau County, New York: $137,000

Wealthiest Counties in the USA 

8. Douglas County, Colorado: $139,000

Wealthiest Counties in the USA 

 7. Howard County, Maryland: $140,000

Wealthiest Counties in the USA 

 6. Marin County, California: $142,000

Wealthiest Counties in the USA 

 5. Fairfax County, Virginia: $150,000

Wealthiest Counties in the USA 

 4. Falls Church, Virginia: $155,000

Wealthiest Counties in the USA 

 3. San Mateo County, California: $156,000

Wealthiest Counties in the USA 

 2. Santa Clara County, California: $159,674

Wealthiest Counties in the USA 

 1. Loudoun County, Virginia: $178,707

Wealthiest Counties in the USA