The Mafia Channel forms the district's eastern boundary.

The Rufiji District also forms a border to the south of Kibiti.

[1] The district is comparable in size to the land area of Samoa.

[4] The District is organised administratively into 16 Wards, 58 Villages, 269 Townships, 1 Small Town Authority, 1 Council, 1 Constituency, 3 Divisions (Mbwera, Kikale, and Kibiti), and 1 Council.

The district is the historic home of the Ndengereko and Rufiji peoples.In total, 122,648 persons (59,168 men and 63,480 women) were counted in the district during the 2012 Population and Housing Census.With a 1.9 percent population growth rate, Kibiti District Council is predicted to have 147,048 residents (71,422 men and 76,626 women) in 2022.