All Local and Municipal Police and Sheriff's Departments

Police and sheriff's departments whose jurisdiction is a single city, county or provincial district, the local tier of the standard three-level policing structure. Most of this atlas's local departments enter the roster as the investigating agency of a specific landmark case rather than as subjects studied for their own institutional history. Belongs here: any law enforcement body whose authority is confined to one municipality, county or comparable local jurisdiction. Does not belong here: agencies with national or federal jurisdiction, grouped under National and Federal Law Enforcement Agencies, or bodies spanning multiple nations, grouped under International and Multinational Bodies.