It was created on 21 July 2008 by splitting off the southern districts from Donggala Regency.

Following religious conflicts in the neighbouring Poso Regency, the Indonesia government mounted Operation Tinombala in early 2016 to combat local terrorist activities carried out by the East Indonesia Mujahiddin (Mujahiddin Indonesian Timur, or MIT) in the province.

[4] In late November 2020, there were indications that the conflict had spread into Sigi Regency when four residents of remote Lembantongoa village were killed in an apparent terrorist attack attributed to MIT.

[5] Indonesia's senior Coordinating Political, Legal and Security Minister Mahfud MD issued a statement saying that the government was committed to tracking down those responsible for the murders and the accompanying destruction.

Note (a) the population of the new Sigi Kota District in 2010 and 2020 is included in the figures for Sigi Biromaru, Dolo and Palolo Districts, from parts of which it was created on 14 September 2020.