Gender

Police employee data by gender
Table 74, "Full-time Law Enforcement Employees, by Population Group, Percent Male and Female, 2009"
Table 75, "Full-time Civilian Law Enforcement Employees, by Population Group, Percent of Total, 2009"
Table 76, "Full-time State Law Enforcement Employees, by State, 2009"
Table 77, "Full-time Law Enforcement Employees, by State, 2009"

Other data by gender:
Arrest data by gender