In project management literature, the concept of program is a group of related projects managed in a coordinated way to obtain benefits not available from managing them individually. This paper attempts to identify program critical success factors focusing on Iran’s construction industry so that the level of relative importance of various factors could be determined for key stakeholders. Furthermore, since a program includes a set of projects, another objective of this study is to find out whether the projects of program are accomplished, successfully or not. Therefore, to run this study, first literature of topic based on research keywords is reviewed. Then a conceptual model including all the aspects of program success factors is presented. Next, critical success factors are quantitatively analyzed by performing an empirical investigation on active organizations and firms of Iran’s construction industry. The study employs questionnaire and performs interview surveys with construction program professionals and experts. Finally, the critical success factors of program are sorted according to their ranks. The results show that program-related factors maintain the highest effects on program success followed by organization-related and project-related issues.