The two largest deserts in Africa are the Sahara Desert and the Kalahari Desert, with the Sahara holding the top spot by a massive margin and the Kalahari ranking second on the continent.
The Sahara Desert
The Sahara Desert is the largest hot desert in the world and by far the largest desert in Africa, covering approximately 9.2 million square kilometers (roughly 3.6 million square miles).
It stretches across 11 North African countries, including Algeria, Egypt, Libya, Morocco, Mali, Mauritania, Niger, Chad, Sudan, and Tunisia.
The desert spans from the Atlantic Ocean in the west to the Red Sea in the east, forming a natural boundary between the Mediterranean region and sub-Saharan Africa.
It's known for extreme aridity and heat, with some areas going years without rainfall and daytime temperatures regularly exceeding 50°C (122°F).
The Kalahari Desert
The Kalahari Desert is the second-largest desert in Africa, covering an area of roughly 900,000 square kilometers (around 350,000 to 360,000 square miles), making it just over one-tenth the size of the Sahara.
It spans parts of Botswana, Namibia, and South Africa, with Botswana making up the largest share of its territory.
Unlike the Sahara, the Kalahari is technically a semi-arid savanna in parts, since it receives more rainfall than a true desert typically would, which supports a noticeably wider range of wildlife.
Its landscape features rolling red sand dunes, sand sheets, and salt pans, and the region is home to species like lions, cheetahs, elephants, and various antelope.
A Side-by-Side Comparison
Feature | Sahara Desert | Kalahari Desert |
|---|---|---|
Rank in Africa | Largest | Second largest |
Approximate Size | 9.2 million km² | 900,000 km² |
Countries Covered | 11 North African countries | Botswana, Namibia, South Africa |
Climate Type | Extremely arid, hot desert | Semi-arid savanna in parts |
Notable Wildlife | Sparse due to extreme conditions | Lions, cheetahs, elephants, antelope |
Wrapping It Up
Between the two, the Sahara and the Kalahari cover a huge share of the African continent and represent two very different versions of what a desert can look like, one defined by relentless heat and near-total dryness, the other softer, greener in places, and far more alive with wildlife. Together, they're a good reminder that "desert" isn't a single fixed category, and understanding both gives a fuller picture of Africa's landscape than looking at either one alone.
Sources
The Kalahari Desert, WorldAtlas: https://www.worldatlas.com/articles/where-does-the-kalahari-desert-lie.html
Kalahari Desert, Wikipedia: https://en.wikipedia.org/wiki/Kalahari_Desert
Sahara vs. Kalahari: Which Desert Is Bigger and How They Differ: https://www.visitrwandagorilla.com/sahara-vs-kalahari/


