The following paper will provide a condensed, yet comprehensive overview of the Iranian legal system from the 19th century up to the present day. Its focus will be on both the history of Iranian jurisprudence as well as the evolution of Iran’s legal system. We will examine three specific periods in order to illustrate how the legal system has evolved. These periods include: the Qajar period during the 19th century, prior to the Constitutional Revolution of 1906; the period following the Constitutional Revolution of 1906 and the establishment of the Pahlavi Dynasty; and finally, the period following the Islamic Revolution of 1979 up to the 21st century.