The East African countries are group of states including Eritrea, Kenya, Tanzania, Djibouti, Uganda, Sudan, South Sudan, Burundi, Ethiopia, Rwanda, and Somalia which joined together to cooperate in the social, political, and economic fields. The topographical variations in East Africa, season association with Indian oceans, and continental volcanoes are some important physical contributors of climate change in addition to greenhouse gas (GHG) emissions. The changes in land use systems are other important issues of climate change. Historically, grazing on land was a widely adopted land system in East African countries which was transformed to croplands and urbanization. The studies analyzed the climate change impacts on the food security of these countries and the results showed great vulnerability.