No, the Sahel is not a desert. It is a transition zone south of the Sahara. It is, however, rapidly become desert through the process of desertification.
Between the Sahara Desert and the northern edge of the savanna is the Sahel. The Sahel is an arid grassland. However, overgrazing is converting the Sahel into desert.
In Africa it is called the Sahel.
The Sahel is the savanna (grassland) area south of the Sahara Desert in Africa.
The Sahara is expanding into the Sahel, the grassland below the desert.
No, there are also the Kalahari Desert and the Namib Desert in Africa as well as the Sahel which is a semiarid grassland.
Between the Sahara Desert and the northern edge of the savanna is the Sahel. The Sahel is an arid grassland. However, overgrazing is converting the Sahel into desert.
Sahel
The Sahel is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara desert to the north and the Sudanian Savanna to the south. It is arid land but not a true desert.
There is no Sahel Desert. The Sahel is a grassland, not a desert. So, the answer to your question is that nobody lives in the Sahel Desert but people do live in the Sahel grassland.
The Sahel
You can find them most often in the Sahel Desert in Africa.
The Sahel is a semi-arid region south of the Sahara.