The Datooga, known as the Mang'ati in Swahili, are a pastoralist Nilotic people of Manyara Region, Tanzania. In 2000 the Datoga population was estimated to number 87,978. There are seven Datooga tribes:

• Bajuta
• Gisamjanga (Kisamajeng, Gisamjang)
• Barabayiiga (Barabaig, Barabayga, Barabaik, Barbaig)
• Tsimajeega (Isimijeega)
• Rootigaanga (Rotigenga, Rotigeenga)
• Buraadiiga (Buradiga, Bureadiga)
• Bianjiida (Biyanjiida, Utatu)

The dialects of the Datooga language are often divergent enough to make comprehension difficult, though Barabayiiga and Gisamjanga are very close.