Fed Stats- one stop shopping for Federal Statistics
National Archive of Criminal Justice Data - From the Inter-University Consortium for Political and Social Research, University of Michigan. A collection of data sets compiled by government agencies and individual researchers. To download data, you must be at a computer where you can copy files to a local disk.
Sourcebook of Criminal Justice Statistics Online - brings together data from more than 100 sources about many aspects of criminal justice in the United States. Archives go back to 1994 and the site is updated annually. Requires Adobe Acrobat Reader®.
Uniform Crime Reports - From US FBI. Data on crimes reported and cleared, persons arrested, drugs in America. Also contains "Crime in the United States", an annual publication from 1995 +