Arusha is a city in Tanzania. The city is the capital of the Arusha Region. It has a population of 617,631 people. Located below Mount Meru on t…Arusha is a city in Tanzania. The city is the capital of the Arusha Region. It has a population of 617,631 people. Located below Mount Meru on the eastern edge of the eastern branch of the Great Rift Valley, Arusha region has a temperate climate. The region is close to the Serengeti National Park, the Ngorongoro Conservation Area, Lake Manyara National Park, Olduvai Gorge, Tarangire National Park, Mount Kilimanjaro, and Mount Meru in the Arusha National Park.