Hannah Arendt, renowned for her insights into political philosophy, particularly in "The Human Condition" and "On Revolution", delineates the dichotomy between the public and private realms. In her analysis, the public sphere represents a space of political agency and rational discourse, crucial for the realization of human freedom and equality. Conversely, the private realm, characterized by necessity and domesticity, traditionally excludes women from active participation in public affairs. This study explores Arendt's theories to analyze gender exclusion in Nigeria's public realm. Historically, Nigerian women have faced systemic marginalization, confined to the private sphere, hindering their political participation. This research aims to evaluate women's representation in Nigerian politics, the impact of colonial and post-colonial policies, and the role of patriarchal structures. Integrating Arendt's framework with gender theory and social exclusion, the study underscores the need for constitutional amendments and cultural shifts to enhance women's political agency. This research proposes multifaceted solutions. These include legislative reforms to promote gender equality, educational initiatives to empower women politically, and cultural shifts to challenge stereotypes and biases against women in leadership roles. Such interventions are crucial for dismantling existing barriers and fostering a more inclusive public sphere where women's voices are heard and their contributions are valued. This research uniquely applies Arendt’s political theory to the contemporary issue of gender exclusion in Nigerian politics, providing a comprehensive analysis that links historical, cultural, and structural factors. It offers actionable recommendations to improve women's political representation and participation, fostering women's education, political advocacy, and cultural change to achieve a more egalitarian society.