Police employee data by region
Table 70, "Full-time Law Enforcement Employees, by Region and Geographic Division by Population Group, Number and Rate per 1,000 Inhabitants, 2010"
Table 71, "Full-time Law Enforcement Officers, by Region and Geographic Division by Population Group, Number and Rate per 1,000 Inhabitants, 2010"

Other data by region:
Offense data by region
Clearance data by region
Arrest data by region