Karo Regency is a landlocked regency of North Sumatra Province of Indonesia, situated in the Barisan Mountains. The regency, which was established on 7 November 1956, covers an area of 2,127.25 square kilometres (821.34 sq mi) and according to the 2010 census it had a population of 350,479, increasing to 404,998 at the 2020 Census; the official estimate as at mid-2023 was 420,799, comprising 208,600 males and 212,200 females. 60.99% of the regency is forested. Its regency seat is the town of Kabanjahe. The Batak Karo language is spoken in the regency, as well as the Indonesian language. It borders Southeast Aceh Regency in Aceh to the west, Deli Serdang Regency and Langkat Regency to the north, Dairi Regency and Toba Samosir Regency to the south, and Deli Serdang Regency and Simalungun Regency to the east.
Sumedang Regency is a landlocked regency (kabupaten) of the West Java Province of Indonesia. The regency covers an area of 1,558.72 km2 and had a population of 1,093,602 at the 2010 Census and 1,152,507 at the 2020 Census; the official estimate as of mid-2023 was 1,178,235 - comprising 593,815 males and 584,420 females. Its administrative centre is in the district of North Sumedang.
Purwakarta Regency is a landlocked regency (kabupaten) of West Java, Indonesia. The town of Purwakarta is its regency seat.
Indragiri Hulu is a landlocked regency (kabupaten) of Riau, Indonesia. It is located on the island of Sumatra. The original regency was split in two on 4 October 1999, with the western half being created as a separate Kuantan Singingi Regency. The regency now has an area of 8,198.71 km2 and had a population of 363,442 at the 2010 census, 408,704 at the 2015 census and 444,548 at the 2020 census; the official estimate as at mid 2023 was 472,799. The administrative seat of the regency is located at the town of Rengat.
Kuantan Singingi is an inland regency (kabupaten) of Riau Province, Indonesia. It is located on the island of Sumatra. The regency was created on 4 October 1999 from what had been the western half of Indragiri Hulu Regency. It has an area of 7,656.03 km2 and had a population of 292,116 at the 2010 Census and 334,943 at the 2020 Census; the official estimate as at mid 2022 was 356,246. The seat of the regency is the town of Teluk Kuantan.
South Bengkulu is a regency of Bengkulu Province, Indonesia, on the island of Sumatra. It originally comprised all of that part of Bengkulu Province situated to the southeast of the city of Bengkulu, but on 25 February 2003 this area was split into three parts, with the most southeastern districts split off to form a new Kaur Regency and the most northwestern districts split off to form a new Seluma Regency. The reduced South Bengkulu Regency now covers 1,219.91 km2, and had a population of 142,940 at the 2010 Census and 166,249 at the 2020 Census; the official estimate as at mid 2023 was 171,463 - comprising 87,297 males and 84,166 females. The regency's administrative centre is the coastal town of Manna.
Semarang is a landlocked regency in Central Java province in Indonesia. It covers an area of 1,019.27 km2 and had a population of 930,727 at the 2010 census and 1,053,094 at the 2020 census; the official estimate at mid 2023 was 1,080,648, comprising 538,117 males and 542,531 females. These figures exclude the independent cities of Semarang and Salatiga, which are administratively separate from the regency. The regency's capital is Ungaran, which lies immediately to the south of Semarang City.
Soppeng Regency is a landlocked regency in South Sulawesi province of Indonesia. Soppeng Regency has its seat of government (capital) in the town of Watansoppeng, located 180 km from Makassar. The regency covers an area of 1,385.55 km2, and had a population of 223,826 at the 2010 Census and 235,167 at the 2020 Census. The official estimate of population as of mid-2023 was 240,955.
Batanghari is a regency of Jambi Province in Sumatra, Indonesia. It originally covered a wider area, but on 4 October 1999 this was split between a new Muaro Jambi Regency in the east and a reduced Batang Hari Regency in the west, which now covers an area of 5,804.83 km2. It had a population of 241,334 at the 2010 census and 301,700 at the 2020 census; the official estimate as at mid 2023 was 312,279. The administrative capital is the town of Muara Bulian(Bulian Estuary or Bulian Delta).
Dairi Regency is an inland regency on the western shore of Lake Toba in North Sumatra Province of Indonesia. The regency was created on 23 September 1964 from what were previously the north-western districts of North Tapanuli Regency; however the southern districts of this new regency were in turn split off on 25 February 2003 to form the new Pakpak Bharat Regency. The reduced regency covers an area of 1,927.80 square kilometres (744.33 sq mi) and it had a population of 269,848 people at the 2010 Census and 308,764 at the 2020 Census; the official estimate as at mid 2023 was 324,747 - comprising 162,928 males and 161,819 females. Its administrative seat is at the town of Sidikalang.
Humbang Hasundutan Regency is a landlocked regency in North Sumatra province of Indonesia. In the east of the regency, Baktiraja District stretches along a short part of the southern shore of Lake Toba in North Sumatra. The regency covers an area of 2,502.71 km2, and it had a population of 171,650 at the 2010 census and 197,751 at the 2020 census; the official estimate as at mid 2023 was 204,700. Its seat is the town of Dolok Sanggul. To the north is Samosir Regency and Pakpak Bharat Regency, to the east is North Tapanuli Regency, and to the west and south is Central Tapanuli Regency, and beyond the latter the Indian Ocean.
Mandailing Natal, a.k.a. Madina, is a regency in North Sumatra Province of Indonesia. It covers an area of 6,620.70 square kilometres and it had a population of 403,894 people at the 2010 census and 472,886 at the 2020 Census; the official estimate as at mid 2023 was 496,975. The capital lies at Panyabungan. The Regency was formerly a part of South Tapanuli Regency until it was created as a separate regency on 23 November 1998. It is the southernmost regency in North Sumatra, and the largest regency by land area in the province, with Langkat Regency second to it.
Padang Lawas is a regency in the North Sumatra province of Indonesia. It covers an area of 3,912.18 km2, and had a population of 226,807 at the 2010 Census and 261,011 at the 2020 Census; the official estimate as of mid-2023 was 275,648 - comprising 138,506 males and 137,142 females. Its administrative seat is the town of Sibuhuan. Padang Lawas Regency was created on 17 July 2007 from southeastern parts of the South Tapanuli Regency. It is the only regency in this province that borders two other provinces, West Sumatra and Riau.
North Padang Lawas is a landlocked regency in the North Sumatra province of Indonesia. It has an area of 3,918.05 km2, and had a population of 223,049 at the 2010 census and 260,720 at the 2020 census; the official estimate as of mid-2023 was 275,448. North Padang Lawas Regency was created on 17 July 2007 from the eastern parts of the South Tapanuli Regency. Its administrative seat is the town of Gunung Tua.
Samosir Regency is an inland regency in North Sumatra. It was created on 18 December 2003 by splitting away the western districts of the former Toba Samosir Regency. The regency covers a land area of 1,444.25 square kilometres, including the whole of Samosir Island in the inland sea of Lake Toba. It had a population of 119,653 at the 2010 census and 136,441 at the 2020 Census; the official estimate for mid 2023 was 141,333 - comprising 70,648 males and 70,685 females. Its administrative seat is the town of Pangururan on the west coast of Samosir Island.
Simalungun Regency is a regency in North Sumatra Province of Indonesia. Its seat was formerly at Pematangsiantar, but this city was under Law No.15 of 10 March 1986 was separated from the Regency and made into an independent city (kota), although it remains geographically surrounded by the regency, whose new administrative seat is at Raya, while the regency's two most populous districts are Bandar and Siantar. The regency now covers an area of 4,372.5 square kilometres, and at the 2010 census it had a population of 817,720; at the 2020 Census this had risen to 990,246, of whom 497,314 were males and 492,932 were females; the official estimate as at mid 2023 was 1,035,920 - comprising 521,262 males and 514,658 females.
Central Tapanuli Regency is a regency in North Sumatra province, Sumatra, Indonesia. The seat of the regency government is at Pandan. The regency covers an area of 2,194.98 km2 and consists of a long extent of land along the western coast of North Sumatra, together with offshore islands of which the largest is Mursala Island; it had a population of 311,232 at the 2010 census and 365,177 at the 2020 Census; the official estimate as at mid-2023 was 386,895. The regency surrounds the landward side of the city of Sibolga, which is administratively separate from the regency.
North Tapanuli Regency is a landlocked regency in North Sumatra province, Sumatra, Indonesia. Its capital is Tarutung. The regency covers an area of 3,793.71 square kilometers and it had a population of 278,897 at the 2010 Census and 312,758 at the 2020 Census; the official estimate as of mid-2023 was 323,102.
Sarolangun Regency is a regency of Jambi Province, Indonesia. It is located on the island of Sumatra. It was created on 4 October 1999 by the division of the former Sarolangun Bangko Regency into a new Merangin Regency and this Sarolangun Regency. The regency has an area of 5,935.89 km2 and had a population of 246,245 at the 2010 census and 290,047 at the 2020 census; the official estimate as at mid 2023 was 302,243. The administrative centre is at the town of Sarolangun.
Way Kanan Regency is a landlocked regency (kabupaten) of Lampung Province, Sumatra, Indonesia. It was created on 20 April 1999 from what were formerly the northern and northwestern districts of North Lampung Regency. It has an area of 3,921.63 km2 and had a population of 406,123 at the 2010 census and 473,575 at the 2020 census; the official estimate as at mid 2023 was 489,773. The administrative centre lies at the town of Blambangan Umpu.
Indonesia 
