This report presents the results of the Association of Research Libraries (ARL) 1986 survey of librarians' salaries in 33 tables. A brief introduction summarizing the most important statistical findings from the survey notes that more minority professional positions were reported in 1986, that the average salaries paid to librarians in public ARL U.S. university libraries were 0.7% higher than those paid their counterparts in privately supported institutions, and that library size and rank structure are factors in library salaries. Explanatory notes and information on survey changes since the previous year are also provided. The document is arranged in five major sections: (1) salary levels for personnel in ARL libraries; (2) median and beginning professional salaries in ARL non-university libraries; (3) average, median, and beginning professional salaries in ARL university libraries; (4) distribution of personnel and average salaries for positions in ARL university libraries, with data characterized by sex, minority status, years of experience, type of institution, size of professional staff, and geographic region; and (5) ARL Salary Survey 1986 University Library Questionnaire and Non-University Library Questionnaire. The 33 data tables are arranged in five broad categories: (1) information on all filled positions reported by 115 university and non-university libraries in this year's survey (Table 1); (2) information on ten non-university libraries (Tables 2 and 3); (3) information on 106 university general libraries in the Association (Tables 4-21); (4) information on university medical libraries (Tables 22-27); and (5) information on university law libraries (Tables 28-33). (KM)