ESOC Project’s data on ethnic populations in Iraq, with separate data on Baghdad. We combine high-resolution population data (LandScan 2008) and maps that bound areas in which ethnic groups reside to estimate ethnic group population numbers at the district administrative level. The boundaries of Iraq’s districts and governorates we use are designed to conform as closely as possible to the boundaries recognized and observed in the household surveys administered by the United Nations World Food Programme (WFP). Some original maps are also available through the Gulf/2000 Project at Columbia University's School of International and Public Affairs (http://gulf2000.columbia.edu/maps.shtml). Our shapefiles were used in Berman, Shapiro, Felter (2011) with very minor improvements to the alignment of district boundaries.