"During the 1990s and 2000s, the percent of sworn law enforcement officers who were women increased only slightly in federal, state, and local agencies. By 2007 nearly 4,000 state police, 19,400 sheriffs', and 55,300 local police officers were women. In 2008, across 62 reporting federal law enforcement agencies there were about 90,000 sworn officers, of whom approximately 18,200 (20%) were women. These 2007 and 2008 numbers suggest a combined total of almost 100,000 female sworn officers nationwide in federal, state, and local law enforcement agencies. Using data primarily from the Bureau of Justice Statistics' Census of Federal Law Enforcement Officers (FLEO) and the Law Enforcement Management and Administrative Statistics (LEMAS) series, this report examines the current state of and trends in the employment of female sworn officers in federal, state, and local law enforcement agencies."
United States Department of Justice: http://www.justice.gov/