The article analyzes the phenomenon of religious parties in the post-Soviet space. It is shown that they were formed either in the formats of Islamic parties or Christian-democratic. There are States that impose a ban on the creation of parties on religious grounds, and those that allow their existence. The prerequisites for the appearance of such restrictions are shown. The article especially analyzes the case of Tadjikistan, where approaches to the possibilities of the legal existence of religious parties have fundamentally changed. Other criteria related to the religious sphere and limiting the activities of parties (propaganda of religious discord and enmity, financing of parties by religious structures, etc.) are also analyzed. The results of the analysis are presented in the summary table 1. The article shows that Islamic and Christian Democratic parties manifest themselves in the post-Soviet space as oppositional. There is an analysis of the prerequisites and factors, the value bases of such a situation. It is shown that Islamic proto-parties and movements offering an alternative project of statehood can exist only in an illegal format, and Christian Democratic parties acquiring national-state specifics can be both oppositional and supporting the current government, depending on its political course. The author also analyzes the reasons for the institutional weakness of religious parties. The conclusion is made about the negative result of projects to create religious parties in the post-Soviet space