<p>The agro-industrial sector generates significant wastes that harms the environmental ecosystems. Maximizing the use of agro-industrial residues to create valuable products can help alleviate this environmental burden. Traditional farming was once resource-efficient, but modern agriculture, driven by the green revolution, heavily depends on chemical inputs and overuses soil, water, and energy, leading to ecological concerns like the emission of greenhouse gas and substantial agro-industrial waste. Current waste disposal methods, including incineration and landfilling, worsen pollution and squander valuable resources, while conventional strategies like composting and bioenergy production are often not economically viable on a large scale. The circular economy, however, offers a sustainable alternative by aiming for zero waste and pollution, converting agro-waste into valuable products like bioplastics. Bioplastics made from agricultural residues—such as Polyhydroxyalkanoates (PHA), polylactic acid (PLA), starch-based, cellulose-based, and protein-based bioplastics—are biodegradable and eco-friendly, produced through processes like microbial fermentation, chemical synthesis, and mechanical processing. Innovations in genetic engineering and nanotechnology have further improved the effectiveness and stability of bioplastic production. This review emphasizes the potential of agro-waste valorisation in bioplastic manufacturing within a circular economy framework, highlighting its effectiveness in mitigating waste management challenges, reducing environmental impact, and supporting a more sustainable and economically viable industrial model.</p> Graphical Abstract <p></p>