15. Alameda County, California
> Monthly cost of living (family of 4): $10,160
> Median annual family income: $99,211
> Monthly childcare costs: $1,499
> Population: 1,605,217
14. Washington, D.C.
> Monthly cost of living (family of 4): $10,331
> Median annual family income: $90,917
> Monthly childcare costs: $3,279
> Population: 659,009
13. Contra Costa County, California
> Monthly cost of living (family of 4): $10,473
> Median annual family income: $101,088
> Monthly childcare costs: $1,537
> Population: 1,107,925
12. Richmond County, New York
> Monthly cost of living (family of 4): $10,490
> Median annual family income: $89,833
> Monthly childcare costs: $2,632
> Population: 473,324
11. Santa Clara County, California
> Monthly cost of living (family of 4): $10,758
> Median annual family income: $116,568
> Monthly childcare costs: $1,559
> Population: 1,885,056
