Burundi is a unitary state which is sub-divided at three levels: provinces, communes, and collines (hills).
The provincial organisation of Burundi has been reformed on a number of occasions with the newest subdivisions dating in March 2023.
With this new administrative subdivision has substantially reduced the number of provinces, communes and hills.
[2] The current provinces are Bubanza, Bujumbura Mairie, Bujumbura Rural, Bururi, Cankuzo, Cibitoke, Gitega, Karuzi, Kayanza, Kirundo, Makamba, Muramvya, Muyinga, Mwaro, Ngozi, Rumonge, Rutana and Ruyigi.
Similarly to the provinces and communes, the number of collines will also be change in 2025 increasing to 3,044.