Kamonyi District is one of the eight districts that make up the Southern Province. It is located in the central region of the country. It is composed of 12 sectors, 59 cells and 317 villages (imidugudu) with a population of 265,365 inhabitants on a total surface area of 655.5 km². Thus, its average density is 404.8 inhabitants/Km2.

The District of KAMONYI shares its borders with Ruhango District in the South, Muhanga District in the West, Bugesera and Nyarugenge districts in the east, Gakenke and Rulindo districts in the North.

The District of Kamonyi enjoys a moderate climate. The frequency of rainfall is rather sufficient. Humidity varies between 1.200 and 1.400 mm and the average temperature is 20ºC. Its relief is made of low lying plateau, except in the western part which is more mountainous.