This report provides information that characterizes libraries in California, profiling each library within its appropriate library type, i.e., public, academic, special, state agency, and county law. The data were gathered through the annual report forms for fiscal year 1988-1989 that were returned by 866 libraries of an estimated total of 1,000 California libraries, excluding school libraries. Presented in the statistical tables are data on activities (e.g., interlibrary loans borrowed and lent, circulation, and total volumes); income; expenditures; staffing; and collections. These data are organized by library type and area population. Also provided is a state summary of library statistics for the fiscal year 1988-1989, plus the 2 preceding years. The data reported include total operating expenditures, salaries, library materials, full-time staff equivalents, total volumes, circulation, interlibrary loan (ILL) borrowings, ILL lending, and total number of reference questions answered during the year. A library index provides an alphabetical list of libraries by short form name with cross references to the full name and city of location. (MAB)