About this Dataroom
Data on World City Level Inequality (Gini Coefficients) aggregated for use in the UN-HABITAT's State of the World Cities Report 2010/2011. A version of this data is in the appendix of the report.
Created by me with other staff of UN-HABITAT.
The state of the world's cities report (linked on the left) has a box on inequality in the US. Otherwise you can use the iPUMS microdata to create gini coefficients for cities. I should have R code somewhere to do it.
They are the released survey data from individuals. Simplifying; to get GINI coefficients you have to basically sum up incomes for individuals and calculate the amount of wealth the lower and upper quantiles have. Instead Read page 80 here and follow up the sources in that box. http://books.google.com/books?id=broGtXylVF8C&lpg=PP1&pg=PA80#v=onepage&q=United%20States&f=false