Waltham is a city in Middlesex county, MA with a population of 61,878. The median household income is $54,010.
Mercer Island is a city in King county, WA with a population of 22,811. The median household income is $91,904.
Some of the data listed here may be outdated, please check out Waltham local info
and Mercer Island local info
for more info.