The Sizaki are a Bantu ethnolinguistic group based in north-western Butiama District of Mara Region of Tanzania, near Lake Victoria. In 1987 the Sizaki population was estimated to number 82,000 .
Mara Region is one of Tanzania's 31 administrative regions. The region covers an area of 21,760 km2 (8,400 sq mi). The region is comparable in size to the combined land area of the nation state of El Salvador. The neighboring regions are Mwanza Region and Simiyu Region, Arusha Region, and Kagera Region. The Mara Region borders Kenya .The regional capital is the municipality of Musoma. Mara Region is known for being the home of Serengeti National Park, a UNESCO World Heritage site and also the birth place of Tanzania's founding father Julius Nyerere. Under British colonial occupation, the Mara Region was a district called the Lake Province, which became the Lake Region after independence in 1961.
The Great Lakes Bantu languages, also known as Lacustrine Bantu and Bantu zone J, are a group of Bantu languages of East Africa. They were recognized as a group by the Tervuren team, who posited them as an additional zone to Guthrie's largely geographic classification of Bantu.