Chicago and Cook County housing data on housing stock, sales data, mortgages, and foreclosure filings and auctions are available here in aggregated geographies. Geographies include Cook County and subregions of the county as well as City of Chicago, and its wards and community areas.
The National Neighborhood Indicators Partnership (NNIP) is a collaborative effort by the Urban Institute and local partners to further the development and use of neighborhood-level information systems in local policymaking and community building.
The Lewis Mumford Center for Metropolitan Racial and Ethnic Change at the University at Albany, SUNY provides data, tables and reports of metropolitan areas in the US.