Abstract: In this research paper we will discuss the concept of God in Hinduism and Islam, the two major world religions. The theme of this paper is to show that monotheism is at the core of both these great religions. Islam is strictly monotheistic but Hinduism has pantheistic and henotheistic tendencies as well. While monotheism means the oneness and transcendence of God pantheism means that the Supreme Being is immanent in His creation and is present everywhere and in everything. Henotheism is the belief in one Supreme Divinity with the belief in other lesser deities.