Landfill leachate, a complex and highly contaminated liquid, poses significant environmental challenges. The need for sustainable and cost-effective treatment technologies has become paramount to mitigate the adverse impacts of leachate on water resources and ecosystems. By utilizing natural processes, minimizing energy consumption, promoting resource recovery, and supporting biodiversity, constructed wetlands offer a sustainable and environmentally friendly approach for landfill leachate treatment. Their cost-effectiveness, long-term performance, and compatibility with ecological systems make them an attractive option for managing the environmental impacts associated with landfill operations. Key aspects discussed include the selection of appropriate wetland vegetation, the role of microbial communities, and the importance of hydraulic control in optimizing treatment efficiency. Nutrient-rich plant biomass can be harvested and utilized for various purposes such as fertilizer production or renewable energy generation, contributing to a circular economy approach. Additionally, the aesthetic and community integration benefits of constructed wetlands are discussed, highlighting their potential for creating sustainable and socially inclusive spaces. The chapter concludes with perspective or future advancements, including hybrid systems, plant selection, and genetic modification, as well as the importance of optimizing treatment processes and evaluating the resilience of constructed wetlands in the face of climate change. It serves as a precious resource for the practitioner, researcher, and decision-maker interested in understanding the prospective and benefits of constructed wetland as a sustainable solution for the treatment of landfill leachate. It underscores the importance of adopting environmentally sound approaches to address the challenges posed by landfill leachate and emphasizes the role of constructed wetlands in achieving sustainable waste management practices.