Sheriff's Offices with Drug Enforcement Units
"Nine in 10 sheriffs' offices regularly performed drug enforcement functions (table 29). Sheriffs' offices with drug enforcement responsibilities employed 90% of all local police officers.
"Thirty-six percent of sheriffs’ offices operated a special unit for drug enforcement with one or more officers assigned full-time (table 30). A majority of sheriffs' offices serving a population of 250,000 or more residents had a fulltime drug enforcement unit. There were an estimated 4,031 officers assigned full time to drug enforcement units nationwide. The average number of officers assigned ranged from 27 in jurisdictions with 1 million or more residents to 2 in those with fewer than 50,000 residents."
Hickman, Matthew J.. and Reaves, Brian A., "Sheriffs' Offices 2003" (Washington, DC: USDOJ, Bureau of Justice Statistics, May 2006), NCJ 211361. p. 15.