Ìlá Òràngún (or Ila) is an ancient city in Osun State, Nigeria, that was capital of an ancient city-state of the same name in the Igbomina area of Yorubaland in south-western Nigeria. Ìlá Òràngún is the more populous sister-city (and sister-kingdom) of Òkè-Ìlá Òràngún, located about 7.5 miles (12 km) to the north-east.
It is the headquarters of the Ila Local Government Area. The people of Ila speak the distinctive dialect of the Yoruba language called Igbomina (or Ogbonna). A common traditional profession of the indigenes of the town is palm-wine tapping. This profession is referenced in one of the most popular songs and common sayings about the town of Ila. The proverb Ila 'o l'oogun, emu l'oogun Ila means: "Ila has no special medicine or magical preparations other than palm-wine".
A folk song also says Ila ni mi, ise mi o le/ti mo ba wa l'orun ope bi 'ofusia' ni i ri, which translates into English as: "I am a citizen of Ila, my profession is very easy; if I am on top of a palm tree, I feel like I am upstairs in a multi-storey building."
Ila-Orangun is the home of the Oyo (now Osun) State College of Education. The African Heritage Research Library was established in 1988.