Poso Regency

The regency as created in 1959 covered a much larger area to the east. However, on 4 October 1999 the regency's south-eastern districts were split off to form a separate Morowali Regency, and on 18 December 2003 the regency's north-eastern districts were likewise split off to form a separate Tojo Una-Una Regency. In 2007 there were calls to divide the remaining Poso Regency into two regencies to overcome religious-based conflicts; one new regency in the southeastern and western sectors would by named Tentena Regency (comprising the first twelve kecamatan listed below), while the residual Poso Regency in the northeast sector (bordering the Gulf of Tomini) would consist of the last seven kecamatan listed below;^[4] however, this proposal was not enacted.

Poso Regency is located within the folds of various mountain ranges, namely the Fennema and Toneba Mountains in the west, the Takolekaju Mountains in the southwest, the Verbeek Mountains in the southeast, and the Pompangeo and Lumut Mountains in the northeast.

At the time of the 2010 Census, the Poso Regency was divided at 2010 into eighteen districts (kecamatan), but an additional 19th district (Pamona Pusalemba) was subsequently added by splitting off the western and southern villages of Pamona Utara District.^[5] The districts are tabulated below with their areas and their populations at the 2010 Census^[2] and the 2020 Census,^[3] together with the official estimates as at mid 2024.^[1] The table also includes the locations of the district administrative centres, the numbers of rural and urban villages in each district (totalling 142 rural desa and 28 urban kelurahan), and its postal code.

Notes: (a) including 3 urban kelurahan (Petirodongi, Sawidago and Tendeadongi). (b) including 3 urban kelurahan (Pamona, Sangele and Tentena). (c) including 3 urban kelurahan (Mapane, Kasiguncu and Tabalu).
(d) all 19 classed as urban kelurahan, comprising 7 in Poso Town (Gebangrejo, Kayamanya, Moengko Baru, Moengko Lama, Gebangrejo Barat, Gebangrejo Timur and Kayamanya Sentral), 5 in South Poso Town (Bukit Bambu, Kawua, Lembomawo, Ranononcu and Sayo) and 7 in North Poso Town (Bonesompe, Kasintuwu, Lawanga, Lawanga Tawongan, Lombogia, Madale and Tegalrejo).

Tambing Lake is located in Lore Lindu National Park, 3 hours drive from Palu and 100 meters away from Palu-Napu Road. In 2014, 3,000 foreign tourists visited Tambing Lake, which is known as Endemic Bird Paradise, with 30 percent of the 270 kinds of birds endemic.^[18]

Sulawesi black Ebony, also known as diospyros celebica, naturally can be found in Central Sulawesi (Parigi, Poso, Donggala), South Sulawesi (Maros), West Sulawesi (Mamuju) and Maluku. The International Union for Conservation of Nature (IUCN) has issued their red list in 2000 and D. celebica belong to the category of vulnerable species, which means that ebony is at the limit of high risk for extinction in the wild (vulnerable to exploitation).^[19]

Most of the endemic fauna in Poso is located in the area of cultural and natural heritage, such as Lake Poso and Lore Lindu National Park. Whitten (1987), Maurice Kottelat, and L.R. Parenti states that there are several species of endemic biota that is only found in Lake Poso, such as Xenopoecilus poptae (Adrianichthys poptae); Adrianichthys kruyti, Weberogobius amadi and Nomorhamphus celebensis. Other endemic fish is Anguilla celebensis, Xenopoecilus sarasinorum, Xenopoecilus oophorus (adrianichthys oophorus), Adrianichthys roseni; gastropods such as Miratesta celebensis; and some small shrimp (Caridina sp).^{[citation needed]}