The largest desert in Africa is the Sahara Desert. It spans approximately 9.2 million square kilometers, making it not only the largest desert in Africa but also the largest hot desert in the world. The Sahara stretches across several countries, including Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Sudan, and Tunisia. Characterized by its arid climate, vast sand dunes, and rocky plateaus, the Sahara faces extreme temperature variations between day and night. Its ecosystem supports a range of flora and fauna adapted to survive in harsh conditions, showcasing the unique biodiversity of the region.