Ogan Komering Ilir Regency (abbreviation OKI) is a regency of South Sumatra Province, Indonesia. It takes its name from the Ogan River and the Komering River, which are the two main rivers that drain the area. The name Ilir means downstream (there are other regencies in the province named Ogan Komering Ulu, South Ogan Komering Ulu and East Ogan Komering Ulu; Ulu means upstream). The administrative centre is the town of Kayu Agung. The regency borders Banyuasin Regency to the northwest, Bangka Strait, and the Java Sea to the east, Lampung Province to the south, and Palembang city, Ogan Ilir Regency, and East Ogan Komering Ulu Regency to the west.
It has an area of 17,075.71 km2 and a population of 727,376 at the 2010 CensusBiro Pusat Statistik, Jakarta, 2011. and 769,348 at the 2020 Census;Badan Pusat Statistik, Jakarta, 2021. the official estimate as at mid 2025 was 820,658 people (consisting of 421,164 males and 399,494 females).Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Ogan Komering Ilir Dalam Angka 2026 (Katalog-BPS 1102001.1602) The regency contains the floodplain lakes, an area of wetland covering about 200,000 hectares. Major crops include coffee, sugar cane, oil palm, rubber, cocoa bean, pineapple, tea and fish.
Administrative districts
Following the splitting off in December 2003 of the most western districts of this regency to form a separate Ogan Ilir Regency, this Regency is administratively composed of eighteen districts (kecamatan), listed below with their areas (in km2)Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Ogan Komering Ilir Dalam Angka 2026 (Katalog-BPS 1102001.1602) and their populations at the 2010 and 2020 Censuses, together with the official estimates as at mid 2025.Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Ogan Komering Ilir Dalam Angka 2026 (Katalog-BPS 1102001.1602) The table also includes the locations of the district administrative centres, the number of villages in each district (there are 327 villages in all comprising 13 urban kelurahan and 314 rural desa) and its postal code.
Kode Wilayah Name ofDistrict(kecamatan) Area in km2 Pop'nCensus2010 Pop'nCensus2020 Pop'nEstimatemid 2025Admin centre No.ofvillagesPostcode 16.02.13 Lempuing 295.47 70,642 73,004 78,753Tugumulyo 1930657 16.02.22 Lempuing Jaya 506.69 59,786 62,543 66,922Lubuk Seberuk 1630657 16.02.04 Mesuji 224.30 38,870 41,147 46,175Pematang Panggang 1730681 16.02.15 Sungai Menang (Menang River)1,992.24 46,567 34,830 34,197Sungai Menang 1830684 16.02.20 Mesuji Makmur 478.69 51,456 56,332 59,339Catur Tunggai 1930682 16.02.21 Mesuji Raya 532.47 34,334 37,896 39,709Kemang Indah 1730683 16.02.11 Tulung Selapan 4,485.13 40,683 46,561 51,338Tulung Selapan Ulu 23 (a) 30655 16.02.18 Cengal 2,631.27 42,778 37,222 37,284Cengal 1730658 16.02.03 Pedamaran 383.35 40,114 44,548 49,744Menang Raya 1430672 16.02.24 Pedamaran Timur (East Pedamaran)671.38 20,110 21,867 24,098Sumber Hidup 730670 16.02.02 Tanjung Lubuk 219.89 32,296 35,355 35,772Pulau Gemantung Ilir(de facto) 22 (b) 30671 16.02.23 Teluk Gelam (Gelam Bay) 164.00 21,268 24,707 25,316Seriguna 1430673 16.02.05 Kota Kayu Agung (Kaya Agung town)224.30 62,694 75,976 81,856Cinta Raja 25 (c) 30617 & 30618 16.02.08 Sirah Pulau Padang 110.22 41,709 45,161 47,181Terate 2030651 16.02.17 Jejawi 227.02 38,098 39,042 43,076Jejawi 1930652 16.02.12 Pampangan 481.54 27,758 29,876 31,934Pampangan 2230654 16.02.19 Pangkalan Lampam 1,091.33 26,033 27,471 30,178Pangkalan Lampam 1930659 16.02.14 Air Sugihan 1,928.14 32,180 35,810 37,786Kertamukti 1930656 Totals 17,075.71 727,376 769,348 820,658Kota Kayu Agung 327
Note: (a) includes the kelurahan of Ujung Tanjung. (b) includes the kelurahan of Tanjung Lubuk. (c) comprising 11 kelurahan (Cintaraja, Jua-jua, Kayu Agung, Kedaton, Kutaraja, Mangun Jaya, Paku, Perigi, Sidakersa, Sukadana and Tanjung Rancing) and 14 desa.
The four districts of Kota Kayu Agung, Sirah Pulau Padang, Jejawi and Pampangan, in the northwest of the regency, with a combined area of 1,043.08 km2 and an estimated population of 204,047 in mid 2025,Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Ogan Komering Ilir Dalam Angka 2026 (Katalog-BPS 1102001.1602) form part of the Palembang metropolitan area.
History In the Dutch colonial period, the region was included in the territory of South Sumatra and Sub Residency (Afdeeling) Palembang and Tanah Datar with its capital of Palembang. The afdeeling was divided into several onder afdeeling, and Ogan Komering Ilir region covers the former areas of onder afdeeling Komering Ilir and onder afdeeling Ogan Ilir.
After the Republic of Indonesia's independence, the territory of Ogan Komering Ilir was included in the residency of Palembang, which included 26 marga. Then, based on the Emergency Act No.4/1956 on the Establishment of the Autonomous Region Regencies in South Sumatra Province, Ogan Komering Ilir became one of the regencies in the province of South Sumatra. After the dissolution of the marga, Ogan Komering Ilir regency was divided into 12 districts and 4 "districts with definitive representation".
By 1996 Ogan Komering Ilir Regency had 14 districts and 4 "districts with definitive representation". For the latter four districts such representation provided Pematang Panggang District (now Sungai Menang District) with Mesuji District as its "parent district", Cengal District with the Tulung Selapan District as its "parent district", Rantau Alai District with Tanjung Raja District as its "parent district", and Jejawi District with Sirah Pulau Padang District as its "parent district". Subsequently in 2001 the government restructured the four "districts with definitive representation" into full districts, so Ogan Komering Ilir thus had 18 districts.
Based on Presidential Decree No.37/2003 on the Establishment of East Ogan Komering Ulu, Ogan Komering Ilir and Ogan Ilir in South Sumatra Province, Ogan Komering Ilir Regency was divided into two regencies, namely a reduced Ogan Komering Ilir Regency and a new Ogan Ilir Regency. Ogan Ilir Regency included the 6 districts of Inderalaya (as the capital), Tanjung Raja, Tanjung Batu, Muara Kuang, Pemulutan and Rantau Alai. After this expansion, Ogan Komering Ilir regency consisted of 12 districts.
Then, in accordance with Regencies Act No.5/2005, five of the existing Ogan Komering Ilir regencies were divided to create six new districts, namely Lempuing Jaya (from part of Lempuing), Mesuji Makmur and Mesuji Raya (from part of Mesuji), East Pedamaran (from part of Pedamaran), Teluk Gelam (from part of Tanjung Lubuk), and Pangkalan Lampam (from part of Pampangan). After this restructuring Ogan Komering Ilir Regency has 18 administrative districts.
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