U.S. Department of Justice Bureau of Justice Statistics  

Types of things you'll find here:

• State level homicide data (no ranking or percentages, just absolute numbers)
• State and national level crime trend estimates
  
• Justice expenditures and employment trends
• Reentry trends in the United States of inmates returning to the community
• International justice statistics
• And lots more

U.S. Centers for Disease Control and Prevention, Division of Violence Prevention

Types of things you'll find here:

• Fact sheets on a variety of forms of violence
• Research in effective violence prevention
• Data on violence as a public health issue
• And much more!
  

National Priorities

The National Priorities Project analyzes and clarifies federal data so that people can understand and influence how their tax dollars are spent.

Types of things you'll find here:

• Interactive chart showing how your tax dollars were spent
• Interactive Trade Offs database showing how tax dollars were spent, and what else could have been provided if money were reallocated from certain expenditures to community needs. Can be detailed from community to county to state levels for most areas.
• Analysis of the federal budget
  

Violence Policy Center

Types of things you'll find here:

• Reports on firearm death rates related to gun laws
• Number of gun dealers in the U.S.and trends by state
• Rates by state of women murdered by men

State Master

A unique statistical database which allows you to research and compare a multitude of different data on U.S. states and see how states compare to one another.

Types of things you'll find here:

• Cost of Nuclear Weapons (per capita)
• Percent of High school students carrying a weapon on school property
• Number of Black inmates on death row
  

State Health Facts from the Henry Kaiser Foundation

Types of things you'll find here:

• Deaths due to firearms by state and other subcategories