Simalungun Regency
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, 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 2024 was 1,051,845, and is projected to rise to 1,067,499 at mid 2025 - comprising 537,650 males and 529,849 females.
Demography
The principal group of inhabitants of the Regency are the Simalungun people, a sub-group of the Batak people. Their language is an Austronesian language.Regent
The regent of Simalungun is Radiapoh Hasiholan Sinaga, SH, who was elected as Regent of Simalungun on Pilkada 2020, and took office on 21 April 2021.Adjoining administrative entities
- North: Serdang Bedagai Regency and Deli Serdang Regency.
- East: Batubara Regency and Asahan Regency.
- South: Toba Regency.
- West: Karo Regency and Lake Toba.
Administrative districts
| Kode Wilayah | Name of District | Area in km2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2024 | Admin centre | No. of villages | Post code |
| 12.08.25 | Silimakuta | 74.16 | 13,611 | 17,479 | 18,979 | Saribu Dolok | 7 | 21169 |
| 12.08.31 | Pematang Silimakuta | 79.68 | 10,334 | 13,390 | 14,589 | Tiga Raja * | 10 | 21167 |
| 12.08.14 | Purba | 172.71 | 21,830 | 27,536 | 29,692 | Tiga Runggu | 14 | 21166 |
| 12.08.15 | Haranggaol Horison | 40.97 | 4,994 | 7,041 | 7,927 | Haranggaol | 5 | 21177 |
| 12.08.20 | Dolok Pardamean | 67.90 | 16,008 | 15,136 | 15,939 | Dolok Pardamean | 11 | 21163 |
| 12.08.09 | Sidamanik | 80.88 | 26,953 | 30,853 | 31,996 | Sari Matondang | 15 | 21171 |
| 12.08.10 | Pematang Sidamanik | 137.80 | 16,283 | 19,716 | 20,926 | Sait Buttu Saribu | 10 | 21188 |
| 12.08.16 | Girsang Sipangan Bolon | 129.89 | 14,325 | 17,941 | 19,293 | Parapat | 6 | 21174 |
| 12.08.11 | Tanah Jawa | 174.33 | 45,568 | 54,900 | 57,670 | Pematang Tanah Jawa | 20 | 21181 |
| 12.08.12 | Hatonduhan | 336.26 | 21,140 | 26,632 | 28,703 | Buntu Bayu | 9 | 21178 |
| 12.08.13 | Dolok Panribuan | 148.62 | 17,947 | 22,018 | 23,488 | Tiga Dolok | 15 | 21173 |
| 12.08.06 | Jorlong Hataran | 93.70 | 15,316 | 19,154 | 20,585 | Tiga Balata | 8 | 21172 |
| 12.08.04 | Panei | 77.96 | 21,425 | 28,326 | 31,105 | Panei | 17 | 21161 |
| 12.08.05 | Panombean Panei | 73.74 | 19,193 | 24,993 | 27,284 | Pematang Panombean | 11 | 21165 |
| 12.08.29 | Raya | 261.56 | 30,876 | 30,150 | 32,092 | Pematan Raya | 17 | 21160 |
| 12.08.32 | Dolog Masagal | 105.77 | 13,406 | 15,153 | Bah Bolon | 10 | 21164 | |
| 12.08.26 | Dolok Silau | 302.66 | 13,716 | 17,696 | 19,249 | Saran Padang | 14 | 21168 |
| 12.08.27 | Silau Kahean | 228.74 | 17,000 | 19,477 | 20,235 | Negeri Dolok | 16 | 21157 |
| 12.08.07 | Raya Kahean | 204.89 | 17,398 | 21,583 | 23,124 | Sindar Raya | 14 | 21156 |
| 12.08.28 | Tapian Dolok | 119.89 | 38,034 | 45,032 | 47,383 | Sinaksak | 11 | 21154 |
| 12.08.17 | Dolok Batu Nanggar | 106.91 | 39,364 | 45,659 | 47,662 | Serbelawan | 16 | 21155 |
| 12.08.01 | Siantar | 73.99 | 62,916 | 73,536 | 76,989 | Dolok Marlawan | 17 | 21151 |
| 12.08.02 | Gunung Malela | 96.74 | 32,676 | 41,189 | 44,403 | Dolok Malela | 16 | 21175 |
| 12.08.03 | Gunung Maligas | 51.39 | 26,173 | 33,734 | 36,681 | Silau Bayu | 9 | 21176 |
| 12.08.18 | Huta Bayu Raja | 191.43 | 29,135 | 35,426 | 37,661 | Hutabayu | 16 | 21182 |
| 12.08.19 | Jawa Maraja Bah Jambi | 38.97 | 19,951 | 22,892 | 23,796 | Jawa Maraja | 8 | 21153 |
| 12.08.21 | Pematang Bandar | 88.16 | 31,324 | 38,688 | 41,379 | Pematang Bandar | 13 | 21186 |
| 12.08.22 | Bandar Huluan | 107.33 | 25,738 | 29,484 | 30,629 | Naga Jaya I | 10 | 21184 |
| 12.08.23 | Bandar | 100.69 | 63,584 | 79,006 | 84,697 | Perdagangan | 16 | 21162 - 21184 |
| 12.08.24 | Bandar Masilam | 91.22 | 24,316 | 30,015 | 32,095 | Bandar Masilam | 10 | 21185 |
| 12.08.08 | Bosar Maligas | 285.43 | 38,970 | 43,355 | 44,532 | Bosar Maligas | 17 | 21183 |
| 12.08.30 | Ujung Padang | 228.49 | 40,522 | 44,803 | 45,909 | Ujung Padang | 20 | 21187 |
| Totals | 4,372.50 | 817,720 | 990,246 | 1,051,845 | Raya | 413 |
Notes: * not to be confused with Tigaraja in Girsang Sipangan Bolon District; in fact the administration of Pematang Silimakuta District would appear to be in Silimakuta Barat desa.
including one kelurahan. comprises 3 kelurahan and 3 desa.
comprises 5 kelurahan and 12 desa.
The 2010 population of the new Dolog Masagal District is included in the figure for Raya District, from which it was cut out in 2017.
includes 2 kelurahan - Aman Sari and Serbelawan. eastern suburbs of Pematangsiantar City.
includes 2 kelurahan - Kerasaan I and Pematang Bandar. includes 2 kelurahan - Perdagangan I and Perdagangan III. The urban area of Bandar comprises the four kecamatan of Pematang Bandar, Bandar Huluan, Bandar and Bandar Masilam, with a combined area of 387.4 km2 and a population in mid 2024 of 188,800.
Six southern districts border directly on the north coast of Lake Toba; from west to east, these are Pematang Silimakuta, Silimakuta, Haranggaol Horison, Dolok Pardamean, Pematang Sidamanik, and Girsang Sipangan Bolon.