<p>Biogas, a byproduct of organic waste decomposition, is a renewable fuel that can be utilised to produce heat and electricity. Due to the considerable waste production and swift urbanisation in Saudi Arabia, there exists enormous potential for harnessing these wastes as an energy resource. This study assesses the potential for biogas production, energy generation, and CO₂ emissions from animal manure, agricultural wastes, and municipal solid waste, divided by regions and provinces. Saudi Arabia possesses over 5 million tonnes of animal manure, 0.46 million tonnes of agricultural waste, and 16.5 million tonnes of urban solid waste are generated annually, with an energy potential of roughly 1.4 billion m³ of biogas and 3000 GWh of electricity. Methane-equivalent CO₂ emissions from land application of these biomass sources can be reduced by 1.205 million tonnes, 1.82 million tonnes, and 7.220 million tonnes through the anaerobic digestion process for energy production. Ultimately, these studies will provide recommendations for future facilities, which will substantially enhance rural and regional development, mitigate environmental degradation, and support Saudi Arabia's diversification of renewable energy sources.</p>