Presented here are the results of a systematic attempt to document on a national scale the existence, quality, and quantity of library service provided to an often neglected segment of the public: the inmates, both adult and juvenile, housed in city and county jails, detention centers, work farms, half-way houses, diagnostic treatment centers, or other local correctional institutions. Entries are provided for all 50 states and each state report includes (1) a narrative summary giving a general overview of the types of materials and services provided, funding, problem areas, how service began, and hopes for the future; (2) a directory giving names and addresses of libraries serving correctional facilities in any capacity; and (3) a chart giving details of services, staffing, and materials provided by those libraries with extensive or varied programs. An introduction describes the background of the survey upon which the listings are based, and a copy of the questionnaire used to gather information from relevant state and local authorities is included. (Author/JL)