The Islamic Republican Party (IRP; Persian: حزب جمهوری اسلامی, romanized: Ḥezb-e Jomhūrī-e Eslāmī, also translated Islamic Republic Party) was formed in 1979 to assist the Iranian Revolution and Ayatollah Khomeini in their goal to establish theocracy in Iran.

[13][1] Early members of the central committee of the party, in addition to founding members, were Hassan Ayat, Asadollah Badamchiyan, Abdullah Jasbi, Mir Hossein Mousavi, Habibollah Askar Oladi, Sayyed Mahmoud Kashani, Mahdi Araghi, and Ali Derakhshan.

Policies it supported included the state takeover of large capital enterprises, the establishment of an Islamic cultural and university system, and programs to assist the poor.

In the late 1980s, factionalism in the IRP intensified, the major issues being the Iran-Iraq War, whether to open up to foreign countries or remain isolated, and economic policies.

"[15] According to Ahmad Mneisi,"While unanimous on the idea of a theological state and united under the umbrella of one party, the Islamic Republican Party (IRP), [the religious right] differed on a number of issues, such as the extent to which religion is to take hold of political life (the Velayat-e Faqih debate).