National Data

National offense data
Table 1, "Crime in the United States, by Volume and Rate per 100,000 Inhabitants, 1989–2008"
Table 1A, "Crime in the United States, Percent Change in Volume and Rate per 100,000 Inhabitants for 2 years, 5 years, and 10 years"
Table 2, "Crime in the United States, by Community Type, 2008"
Table 7, "Offense Analysis, United States, 2004–2008"

Crime Clock

Other National data:
National clearance data
National arrest data
National police employee data