Prior to 1993, the Tooro sub-region also included the following, which are now part of Rwenzururu sub-region:
Bundibugyo District (formerly part of Kabarole District [then known as Tooro District] until 1974)
Kasese District (formerly part of Kabarole District [then known as Tooro District] until 1974)
Ntoroko District (formerly part of Bundibugyo District until 2010)
History
In 1967, Milton Obote abolished the Uganda traditional monarchies. When Yoweri Museveni restored them in 1993, the sub-region had shrunk to its present size after Obudhingiya bwa Bwamba in Bundibugyo district and Obusinga bwa Rwenzururu in Kasese district became independent. The sub-region was home to an estimated 1 million people in 2002, according to the national census conducted that year.