Law Enforcement Management and Administrative Statistics (LEMAS), 2020

The Law Enforcement Management and Administrative Statistics (LEMAS) survey collects data from a nationally representative sample of general-purpose agencies (i.e., local and county police departments, sheriffs' offices, and primary state police agencies). The 2020 LEMAS sample design called for the survey questionnaire to be sent to 3,499 general purpose law enforcement agencies, including 2,631 local and county police departments, 819 sheriffs' offices, and the 49 primary state police departments (Hawaii does not have a primary state police agency). The design called for all agencies employing 100 or more full-time equivalent sworn personnel to be included with certainty (self-representing), and for smaller agencies to be sampled from strata based on number of full-time equivalent sworn officers and type of agency. A total of 37 local police departments were determined to be out-of-scope for the survey because they had closed, had less than one full-time equivalent sworn officer, had contracted out their services with another law enforcement agency, or only had special enforcement responsibilities. The final mail out total of 3,462 agencies included 2,611 local police departments, 802 sheriffs' offices, and the 49 state agencies.

《执法管理与行政统计》（LEMAS）调查从全国代表性的通用机构样本（即，地方和县级警察局、郡治安官办公室以及主要州警察机构）中收集数据。2020年LEMAS的样本设计要求将调查问卷发送至3,499个通用执法机构，包括2,631个地方和县级警察局、819个郡治安官办公室以及49个主要州警察局（夏威夷没有主要州警察机构）。该设计要求所有拥有100名或以上全职等效宣誓人员的机构必须被纳入调查范围（自我代表），而对于规模较小的机构，则根据全职等效宣誓官员的数量和机构类型从分层中抽取样本。由于以下原因，共有37个地方警察局被确定为调查范围之外：机构关闭、拥有少于一名全职等效宣誓官员、将服务外包给其他执法机构或仅有特殊执法职责。最终寄出的调查问卷总计3,462份，包括2,611个地方警察局、802个郡治安官办公室和49个州警察机构。