Hunterdon County?

1. Fairfax County, Virginia: Fairfax County, located in the Washington, D.C. metropolitan area, is known for having one of the highest median household incomes in the United States.

2. Loudoun County, Virginia: Another affluent county in the Washington, D.C. area, Loudoun County is known for its high median household income and rapid growth.

3. Howard County, Maryland: Howard County, situated between Baltimore and Washington, D.C., consistently ranks among the counties with high median household incomes.

4. Los Alamos County, New Mexico: Los Alamos County, home to Los Alamos National Laboratory, often has one of the highest median household incomes in the U.S.

5. Hunterdon County, New Jersey: Hunterdon County, located in the New York City metropolitan area, is known for its high income levels and picturesque rural landscapes.