The Brookings Institution, updated April 2015. The Earned Income Tax Credit (EITC) Interactive provides users with access to IRS data on federal individual income tax filers. Information on all tax filers and on filers who claim the EITC are available for all ZIP codes, cities, counties, metropolitan areas, states, state legislative districts, and congressional districts in the United States.

http://www.brookings.edu/research/interactives/eitc