Doha, the capital of Qatar, is the country’s administrative, economic, and political hub. With most of Qatar’s population residing in the metropolitan area, Doha effectively functions as a city-state. While the rapid growth of this Gulf metropolis is often celebrated as an emerging center of economic and cultural activity, the subtle yet crucial socio-cultural influences shaping its development as a rentier city-state are frequently overlooked in the existing literature. This research article explores the unique challenges rentier cities like Doha face in becoming truly smart and sustainable. Using a case study approach, the analysis draws from secondary data sources, including city reports, policy documents, and academic studies. By examining publicly available data and Doha’s urban planning history, the article identifies the critical issues and challenges the city faces, particularly following the 2022 FIFA World Cup. It reviews existing planning policies and offers insights into current initiatives and future directions aimed at achieving smart and sustainable development. The findings suggest that while Doha has made considerable progress, more inclusive and comprehensive policies are needed to move beyond entrenched socio-cultural influences and align the city’s growth with its broader sustainability and smart city goals.