| Official Name: | Labuhanbatu Regency |
| Native Name: | لابوهن باتو Labuhanbatu |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Ika Bina En Pabolo (It's Built It's Repaired) |
| Coordinates: | 2.2667°N 100.1°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | North Sumatra |
| Seat Type: | Regency seat |
| Seat: | Rantau Prapat |
| Leader Title: | Regent |
| Leader Name: | Vacant |
| Leader Title1: | Chairwoman of Council of Representatives |
| Leader Name1: | Meika Riyanti Siregar (Golkar) |
| Leader Title2: | Vice Chairpeople of Council of Representatives |
| Leader Name2: | Abdul Karim Hasibuan (Gerindra), Juraidah Harahap (People's Conscience Party) and M Rasyid Rangkuti (Nasdem) |
| Area Total Km2: | 2561.38 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 513826 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | WIB |
| Utc Offset1: | +7 |
Labuhanbatu Regency (Kabupaten Labuhanbatu, alternatively Kabupaten Labuhan Batu), alternatively written in space as Labuhan Batu Regency, is a regency of North Sumatra Province in Indonesia. Its administrative seat is Rantau Prapat. An original regency (formed on 7 November 1956) of the province, it had an area of 9,703 km2 as at early 2008, prior to the separation out of its southern and its north-western districts respectively to create the new South Labuhanbatu and North Labuhanbatu Regencies on 21 July 2008 (in accordance with Laws Nos. 22 and 23 respectively of that year).
Subsequently, the reduced regency has an area of 2,561.38 km2 and had a census population in 2010 of 415,248,[2] which rose to 493,899 at the 2020 Census;[3] the official estimate as at mid 2023 was 513,826 (comprising 260,702 males and 253,124 females).[4]
The Panai Estuary, which consists of the Bilah River and Barumun River are located in this regency, and it was the seat of the ancient Buddhist trading kingdom of Pannai, ca. 11th to 14th centuries, connected to the Bahal temple in North Padang Lawas Regency.
Following the separation off of thirteen districts (kecamatan) to form the new South Labuhanbatu and North Labuhanbatu Regencies on 21 July 2008 (in accordance with the enabling Laws enacted on 24 June 2008), the reduced regency is now divided administratively into nine districts, tabulated below with their areas and their populations at the 2010 Census[5] and the 2020 Census,[6] together with the official estimates as at mid 2023.[7] The table also includes the locations of the district administrative centres, the number of administrative villages in each district (totaling 75 rural desa and 23 urban kelurahan - the latter chiefly in the town of Rantau Prapat), and its post code.
| Kode Wilayah | Name of District (kecamatan) | Area in km2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2023 | Admin centre | No. of villages | Post code | |
|---|---|---|---|---|---|---|---|---|---|
| 12.0.09 | Bilah Hulu (Upper Bilah) | 293.23 | 56,388 | 64,416 | 66,516 | Aek Nabara | 24 | 21451 | |
| 12.10.14 | Pangkatan | 355.47 | 31,738 | 37,766 | 39,285 | Pangkatan | 7 | 21462 | |
| 12.10.07 | Bilah Barat (West Bilah) | 202.98 | 33,753 | 39,953 | 41,521 | Janji | 10 | 21411 (a) | |
| 12.10.08 | Bilah Hilir (Lower Bilah) | 430.83 | 49,928 | 59,370 | 61,751 | Negeri Lama | 13 (b) | 21471 | |
| 12.10.20 | Panai Hulu (Upper Panai) | 276.31 | 33,144 | 38,028 | 39,299 | Tanjung Sarang Elang | 7 | 21470 | |
| 12.10.18 | Panai Tengah (c) (Middle Panai) | 483.74 | 33,570 | 41,143 | 43,027 | Labuhan Bilik | 10 (d) | 21472 | |
| 12.10.19 | Panai Hilir (e) (Lower Panai) | 342.03 | 35,811 | 42,761 | 44,509 | Sei Berombang | 8 (f) | 21473 | |
| 12.10.02 | Rantau Selatan (South Rantau Prapat) | 64.32 | 57,948 | 73,977 | 77,936 | Sioldengan | 9 (g) | 21421 - 21429 | |
| 12.10.01 | Rantau Utara (North Rantau Prapat) | 112.47 | 82,830 | 96,485 | 99,982 | Rantau Prapat | 10 (h) | 21411 - 21419 | |
| Totals | 2,561.38 | 415,110 | 493,899 | 513,826 | Rantau Prapat | 98 |
Notes: (a) except the desa of Kampung Baru, which has a post code of 21415. (b) including the two kelurahan of Negeri Lama and Negeri Baru.
(c) including the offshore island of Pulau Ongah Labuhan. (d) including the kelurahan of Labuhan Bilik.
(e) including the offshore island of Pulau Sikantan. (f) including the kelurahan of Sei Berombang.
(g) comprises 9 kelurahan - Bakaran Batu, Danobale, Lobu Sona, Perdamean, Sidorejo, Sigambal, Sioldengan, Ujung Bandar and Ujung Kompas. (h) comprises 10 kelurahan - Aek Paing, Bina Raga, Cendana, Kartini, Padang Bulan, Padang Matinggi, Pulo Padang, Rantau Prapat, Sirandorung and Siringo-ringo.