Social Explorer

  ICPSR (Inter-University Consortium for Political and Social Research, Institute for Social Research, University of Michigan)

  Data-Planet (Sage)

  Crime in the United States (Uniform Crime Report - FBI)

  Sourcebook of Criminal Justice Statistics

  Bureau of Justice Statistics

  National Archive of Criminal Justice Data

  Uniform Crime Report (Pennsylvania State Police)

  Statistical Abstract of the United States

  American FactFinder

  Roper Center for Public Opinion Research (iPOLL)

  Polling the Nations