Investigator(s): Bureau of Justice Statistics The National Justice Agency List is a master name and address file created and maintained by the United States Bureau of the Census for the Bureau of Justice Statistics. The file was first created in 1970, and the Census Bureau has continued to maintain and expand the file. For the original survey, each county in the United States and each municipality and township with a 1960 population of 1,000 or more persons was surveyed to identify the names and addresses of the criminal justice agencies and institutions controlled by local government. The survey was conducted by mail canvass. In addition to the mail survey, the Census Bureau collected information on state-level governments and counties with a 1960 population of 500,000 or more and cities with a 1960 population of 300,000 or more through in-house research methods. The reference information included a variety of published government documents such as budget statements, organization manuals, and state, county, and municipal directories.