842,000 in Kenya (2009 census), increasing. Population total all countries: 1,297,000.
Kajiado and Narok counties; Kiambu county enclave west of Nairobi; another enclave north of Nairobi in Laikipia county; small border area, Taita-Taveta county.
Arusa (Arusha), Damat, Iloodokilani, Kaputiei, Keekonyokie, Kisonko, Kore, Laitokitok, Loitai, Matapo, Moitanik (Wuasinkishu), Parakuyo (Baraguyu, Ilparakuyo, Kwavi), Purko, Siria. Arusha is distinct from Bantu Chaga-related variety. Reportedly Arusha, who are pastoralists, dress like Maasai and speak a Maasai-related variety; whereas, agriculturalists intermarry with the Chaga. Other sources say the Arusha originally spoke a Bantu language. Lexical similarity: 82%–86% between Kenya and Tanzania dialects. Purko has 91%–96% lexical similarity with other Kenya dialects, 82% with Baraguyu, 86% with Arusa, 77%–89% with Samburu [saq], 82%–89% with Chamus [saq], 60% with Ngasa [nsg] (Ongamo).
Latin script [Latn].
Seminomadic. Purko is the largest dialect in Kenya and centrally located. Traditional religion, Christian.