Data on selected characteristics of union and nonunion members of the Western Illinois University faculty for the fall semester 1981 are presented and analyzed. For each department and college, information is presented on nonunion and union members as follows: number and percentage of faculty, sex, tenure status, term number, doctoral degree, average salary, and average age. Information is also presented on union members as a percent of the bargaining unit, compared by rank. The Western Illinois data and findings from the literature agree on two characteristics of the typical faculty union member: doctorate lacking (i.e., terminal degree not completed) and average salary. Except for the instructor group at Western Illinois, it was found that the lower the academic rank, the higher the percentage of union members. Findings from the literature indicate that the typical faculty union member is male, untenured, and young; however, data from Western Illinois did not confirm these characteristics. It is suggested that some of the Western Illinois faculty have additional motives for joining a union. It is believed that anti-administration feeling is quite strong and could have been influential in determining the decision to join a union. (SW)