To determine what it actually costs to live in America’s most expensive cities, 24/7 Wall St. reviewed estimates from the Economic Policy Institute on what it would cost for a single adult or a family of four (two parents and two children) to have a “modest yet adequate standard of living” in those places. All cost figures came from the EPI. Median family income and median individual income figures came from the U.S. Census Bureau’s American Community Survey. They represent 1-year estimates for 2017. Notably, EPI’s expense figures are based primarily on average cost figures, but both the family income and individual income figures are median values. The monthly median individual income figure listed is for employed workers only.