The study aimed at finding out the degree of delegation of authority by the deans of academic colleges in Jordanian public universities and its relationship with the job performance of the department chairpersons. The sample consisted of (206) academic department chairpersons. Two tools were used to collect data: Authority delegation questionnaire, and job performance questionnaire. The findings of the study were: - The degree of delegation of authority by the deans of academic colleges at the Jordanian universities, from academic department chairpersons\' point of view, was high. - The level of job performance of academic department chairpersons, from their point of view, was high. - There was a significant relationship at (= 0.05) between the degree of delegation of authority of the deans and the level of job performance of academic department chairpersons.