Employee fringe benefits, characteristics of head librarians, and interlibrary loan activity among Illinois public libraries are described in this compilation of three reports. The first and largest report delineates results of a 1980/81 fringe benefit survey conducted by telephone interview. It is noted that the Chicago Public Library was specifically excluded from this study of Illinois public libraries. Information is presented on reimbursement for evening, weekend, and overtime work; paid holidays; paid vacations; paid sick leave; other types of leave of absence; support for continuing education and professional association activity; group insurance; retirement provisions; and other fringe benefits. An index of four major public library fringe benefits developed for the sake of comparison, sample survey forms, and 12 tables of data are provided. The second report presents information on Illinois head public librarians by sex, extent of formal education, salary, size of library, and location of library within Illinois. Data extracted from 1979/80 and 1980/81 annual reports are displayed in four tables. A summary of interlibrary loan activity for Illinois public libraries from 1976/77 to 1980/81 is briefly presented in the third report, which includes data on loans received and transmitted. (ESR)