In order to fill an information gap regarding the employment of professional, administrative, and technical personnel by local governments, this study developed the methodology to estimate local government manpower supply and demand, and applied this methodology to the Illinois labor force. Occupations for which the needs are critical were projected through 1975, on the basis of a questionnaire survey of local government officials. For each of 100 occupations involved in performing 13 functions of local governments, local officials were asked to provide information on salary, education, projected needs, and recruitment difficulties. A sample questionnaire and a description of the regression and the data are appended. (BH)