This study investigates the central Islamic concepts of al-ḥaqq (truth) and al-ḥaqīqa (reality), focusing primarily on their theological and textual significance in the Qur'ān while integrating perspectives from Islamic thought. The term al-ḥaqq encompasses a rich semantic range, including truth, reality, rightness, and divine necessity. Its repeated invocation in the Qur'ān not only describes divine attributes but also establishes a foundational framework for understanding existence, human purpose, and ultimate reality. The study begins with a philological analysis of al-ḥaqq within the Qur'an, exploring its contextual meanings and its role in articulating God's sovereignty, justice, and guidance. This textual approach is complemented by an inquiry into the theological implications of al-ḥaqq, particularly how it informs Islamic cosmology and eschatology. The research also reflects on the question of truth in interreligious and hermeneutical contexts, examining how al-ḥaqq can serve as a bridge for understanding across traditions. While acknowledging mystical dimensions of al-ḥaqq as articulated in later Islamic thought, including Sufi metaphysics, the focus remains on the Qur'anic portrayal as the epistemic and ontological cornerstone of Islamic theology. This study thus situates al-ḥaqq and al-ḥaqīqa as central to both divine revelation and human comprehension.