Together, Nassau and Suffolk Counties in Long Island, New York, make up the most expensive place to live. Wikipedia After paying your rent or mortgage, transportation, utilities, and any other bills, how much do you have left at the end of the month? The answer probably depends largely on where you live.

FindTheBest created a cost of living index based on 2013 family budget estimates for housing, taxes, healthcare, childcare, transportation, and "other necessities" (like food) from the Economic Policy Institute to compare, in over 600 counties and metro areas across the US, where your dollar goes the farthest.

The average overall index for US cities and metro areas is 100, so a city with an index of 120 is 20% more expensive than average, and a city with an index of 80 is 20% cheaper than average.