Criminology and Criminal Justice 

United States

• ATF Statistics- Firearms Manufactureres and Exports/ Tax Collection Firearms, Alcohol and Tobacco
• Bureau of Justice Statistics - Statistics on every facet of Criminology/Justice - including
  • Correction Statistics
  • Homicide Trends in the United States
  • Intimate Partner Violence in the United States
  • Law Enforcement Statistics
  • Statistics on Drugs and Crime
• Federal Bureau of Prisons: Inmate Population, sentences and offenses
• Federal Justice Statistics Resource Center
• Juvenile Justice Statistical Briefing Book - Juvenile Arrests; Juvenile Suicide
• Sourcebook of Criminal Justice Statistics
• Substance Abuse and Mental Health Services
• Uniform Crime Reports - Crime, Hate Crimes, Officers Killed
• National Archive of Criminal Justice Data from the Inter-University Consortium of Political and Social Research

Marquette University

• Department of Public Safety Newletter, Awareness - Quarterly Crime Statistics

Milwaukee

• Milwaukee Police Department - Crime Maps and Statistics; Police Reports
• Milwaukee County Sheriff

Wisconsin

• Wisconsin Office of Justice Crime Statistics

Independent

• The Crime Report
• Death Penalty Information Center - Executions in the United States
• National Center for Victims of Crime Statistics
• NationMaster.com - graphically compare nations from such sources as the CIA World Factbook, UN, and OECD.  SELECT CRIME as a search category.
• United Nations Crime and Justice Information Network
• United Nations Global Report on Crime and Justice