In the spring of 1980, the State of Wisconsin Division for Library Services conducted a survey to determine the level of children's services offered by public libraries throughout the state. Questionnaires were sent to the 435 public library units in the state offering library services, and 363 of these responded to the survey. Cross tabulations were made of the locality populations of the responding libraries, with such factors as library staff size, and level of budget allocations for children's services. Survey data were analyzed to determine the effect of administrative policies and procedures, library budgets, hours of library service, acquisitions practices, library staffing, and physical facilities on these services. Children's services in Wisconsin public libraries were shown to be strong in the areas of informational requests, materials access, summer programming, and continuing education for staff, but weak in the areas of management, administration, and collection development. Data are presented in 11 summary tables and five figures. Accompanying the text are a chronology of survey activities, a roster of the survey planning committee, a bibliography, and a copy of the questionnaire and its cover letter. (JL)