Chad is a landlocked nation located in north-central Africa, often referred to as the "Dead Heart of Africa" due to its interior location far from any coastline. Its vast territory of approximately 1.28 million square kilometers makes it the fifth-largest country on the continent. The nation is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west. This central positioning places it at a historical crossroads, bridging North Africa's Islamic influences with the diverse cultures and traditions found in sub-Saharan Africa.

The geography of the country is exceptionally diverse, transitioning from the harsh, hyper-arid sands of the Sahara Desert in the north to the fertile, tropical savannas and woodlands of the south. This transition creates a variety of ecosystems, including the Tibesti Mountains, which house Emi Koussi, a dormant volcano and the highest point in the country at 3,445 meters. Central Chad is characterized by the Sahelian belt, a semi-arid steppe that serves as a vital transition zone. These distinct geographic regions have historically shaped the settlement patterns, agricultural practices, and nomadic lifestyles of the various populations inhabiting the territory.

Lake Chad, after which the country is named, serves as a defining environmental and cultural feature. Historically one of the largest freshwater bodies in the world, it has been a critical hub for trans-Saharan trade routes and a lifeline for millions of people across four neighboring countries. However, due to a combination of climate change, persistent drought, and increased human consumption, the lake has shrunk dramatically over the past several decades. This reduction has had profound impacts on regional security, food production, and the livelihoods of those who depend on fishing and irrigated farming along its receding shores.