This chapter delves into circular urban agriculture, examining strategies for sustainable food production in rapidly growing cities. As urbanisation accelerates, cities face the challenge of feeding an estimated nine billion people while minimising the environmental impact of agriculture. Traditional agricultural practices contribute to resource depletion and pollution, making a circular approach essential for sustainable urban development. Circular urban agriculture integrates resource efficiency by using waste streams, conserving water, and minimising inputs like soil and fertilisers. The chapter discusses various urban farming methods, including rooftop gardens, vertical farming, hydroponics, and community gardens. These practices can increase local food production while reducing the environmental footprint of cities. Water conservation and recycling are emphasised as critical components of circular urban agriculture. Strategies such as drip irrigation, greywater reuse, and rainwater harvesting help reduce reliance on municipal water supplies, lower operational costs, and promote sustainability. The chapter also highlights resource recovery, particularly through nutrient recycling and the use of biosolids, to enhance soil quality and increase agricultural productivity. By adopting circular practices, cities can support local food production, improve resource efficiency, and contribute to urban resilience, all while fostering community relationships and reducing the environmental impact of traditional agricultural systems.