2015 in Tanzania
- President: Jakaya Kikwete (until 5 November), John Magufuli (starting 5 November)
- Vice-President: Mohamed Gharib Bilal (until 5 November), Samia Suluhu (starting 5 November)
- Prime Minister: Mizengo Pinda (until 5 November), Kassim Majaliwa (starting 20 November)
- Chief Justice: Mohamed Chande Othman
- October 25 - A general election is to be held.