The interrelation between renewable energy (RE) deployment and environmental sustainability is increasingly critical for sustainable development in Iraq, Iran, and Turkey. Iraq possesses abundant solar irradiation and favorable wind corridors, yet renewable energy contributes less than 2% of electricity generation due to policy gaps, financial constraints, and technical limitations. In contrast, Iran and Turkey have implemented structured policies, feed-in tariffs, and private sector engagement, resulting in more significant renewable adoption. Renewable energy offers substantial environmental benefits, including greenhouse gas mitigation, improved air quality, water conservation, and promotion of circular economy practices through biomass and waste-to-energy systems. Effective implementation requires coherent policy frameworks, financial incentives, technical capacity building, and public awareness. Integration of hybrid systems, smart grids, and GIS-based site selection enhances reliability and efficiency, mitigating intermittency challenges. Strategically expanding renewable energy in Iraq can transform the national energy system into a low-carbon, decentralized, and resilient infrastructure. Such a transition supports socio-economic development by creating jobs, improving energy access, and reducing dependence on fossil fuels while contributing to long-term environmental sustainability. Comparative insights from Iran and Turkey provide practical pathways for policy, technology, and institutional development to accelerate Iraq’s renewable energy adoption.