Abu Nasr Muhammad Alfarabi, the medieval Muslim philosopher and the founder of Islamic Neoplatonism, is best known for his political treatise, Mabadi ara ahl al-madina al- fadhila (Principles of the Opinions of the Inhabitants of the Virtuous City), in which he proposes a theory of utopian virtuous city. Prominent scholars argue for the Platonic nature of Alfarabi’s political philosophy and relate the political treatise to Plato’s Republic. One of the most striking similarities between Alfarabi’s Mabadi ara ahl al-madina al- fadhila and Plato’s Republic is that in both works the theory of virtuous city is accompanied by a theory of soul. It is true that Alfarabi’s theory of soul differ considerably from that of Plato’s Republic. However, we propose that notwithstanding the differences, the two theories of soul do play an identically important role in the respective theory of virtuous city. The present article explores the relationship between the soul and the city in Plato’s Republic and Alfarabi’s Mabadi ara ahl al-madina al- fadhila, and intends to show that in both works the coexistence of the theory of soul and the city is neither coincidental nor a casual concurrence of two themes. Rather, the concept of soul serves as a foundation on which Plato and Alfarabi erect their respective theory of perfect association. Thus, Alfarabi’s treatise resembles Plato’s Republic not only in the coexistence of the theory of soul and the city, but also in the important role of the concept of soul in the theory of virtuous city.