This paper reports the results of a survey of 1,277 libraries in Illinois which investigated the status of job sharing in armed forces, college and university, community college, government, law, medical, public, religious, and special libraries and library systems. Job sharing is described as the division of one full-time job between two or more people, who voluntarily work part-time and share the responsibilities and benefits of one full-time job. Queries to job sharers and their library directors measured job sharing by focusing on such factors as reasons for job sharing, characteristics of the shared job, and the overall effectiveness of job sharing as perceived by the job sharers and library administrators. The survey showed that both employers and employees are overwhelmingly in favor of job sharing, although both advantages and disadvantages are identified. In particular, the importance of communication was stressed, and the need for additional time to be spent on both supervision and evaluation was noted. (EW)