| Official Name: | Sinjai Regency |
| Native Name: | Kabupaten Sinjai |
| Native Name Lang: | id |
| Type: | Regency |
| Coordinates: | -5.1167°N 129°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Sulawesi |
| Seat Type: | Capital |
| Seat: | Sinjai |
| Leader Title: | Regent |
| Leader Name: | Sabirin Yahya |
| Leader Title1: | Vice Regent |
| Leader Name1: | A Fajar Yanwar |
| Area Total Km2: | 819.96 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 273559 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | Indonesia Central Time |
| Utc Offset1: | +8 |
| Area Code Type: | Area code |
| Area Code: | (+62) 482 |
| Pushpin Map: | Indonesia_Sulawesi#Indonesia |
| Pushpin Map Caption: | Location in Sulawesi and Indonesia |
Sinjai Regency is a regency of the South Sulawesi province of Indonesia. The regency, which is separated from the Bone Regency to its north by the River Tangka, covers an area of 819.96 km2. It had a population of 228,936 at the 2010 census[2] and 259,478 at the 2020 census.[3] The official estimate of population as of mid-2024 was 273,559 (comprising 135,661 males and 137,898 females).[4] It includes the Nine Islands (Kepulauan Sembilan) in the Gulf of Bone off the east coast of the southern peninsula of Sulawesi; this archipelago forms an administrative district within the regency. The regency's principal town lies at Sinjai, a port situated on the east coast of that peninsula.
The small group of mountainous, forest-covered islands known as the Sembilan Islands lies on the east coast of South Sulawesi province and is northeast of the port town of Sinjai. Notwithstanding the name, ten named islands are forming the group, as Pulau Kanalosatu and Pulau Kanalodua are structurally linked and normally classed as one island (Kanalo). There are four administrative desa within the district.
In the south, the desa of Pulau Buhung Pitue (with an area of 2.15 km2) covers the island of Pulau Burungloe. To the northeast, the desa of Pulau Harapan (1.75 km2) covers the islands of Pulau Liangliang and Pulau Kambuno. Further north is the desa of Pulau Padaelo (1.80 km2), which covers the island of Pulau Kodingare. Finally, north and west of Pulau Kodingare, the desa of Pulau Persetuan (1.85 km2) covers the islands of Pulau Batanglampe, Pulau Kanalosatu, Pulau Kanalodua, Pulau Katindoang, Pulau Lapoipoi and Pulau Larearea.
The regency is divided into nine districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census[5] and the 2020 Census,[6] together with the official estimates as of mid-2023.[7] The table also includes the locations of the district administrative centers, the number of administrative villages in each district (totaling 67 rural desa and 13 urban kelurahan), and their postcode (s).
| Kode Wilayah | Name of District (kecamatan) | (English name) | Area in kn2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2023 | Admin centre | No. of villages | Post code | |
|---|---|---|---|---|---|---|---|---|---|---|
| 73.07.01 | Sinjai Barat | (West Sinjai) | 135.53 | 22,985 | 25,873 | 27,193 | Tassililu | 9 (a) | 92653 | |
| 73.07.07 | Sinjai Borong | 66.97 | 15,901 | 17,718 | 18,888 | Pasir Putih | 8 (b) | 92662 | ||
| 73.07.02 | Sinjai Selatan | (South Sinjai) | 131.99 | 37,055 | 40,473 | 42,032 | Bikeru | 11 (b) | 92661 | |
| 73.07.08 | Tellu Limpoe | 147.30 | 31,448 | 37,724 | 40,606 | Mannanti | 11 (b) | 92681 | ||
| 73.07.03 | Sinjai Timur | (East Sinjai) | 71.88 | 28,971 | 33,765 | 36,200 | Samataring | 13 (b) | 92671 | |
| 73.07.04 | Sinjai Tengah | (Central Sinjai) | 129.70 | 25,867 | 28,337 | 29,572 | Samaenre | 11 (b) | 92652 | |
| 73.07.05 | Sinjai Utara | (North Sinjai) | 29.57 | 43,467 | 50,498 | 52,552 | Balingnipa | 6 (c) | 92611 - 92616 | |
| 73.07.06 | Bulupoddo | 99.47 | 15,681 | 17,522 | 18,470 | Lamatti Riattang | 7 | 92654 | ||
| 73.07.0-9 | Pulau Sembilan | (Nine Islands) | 7.55 | 7,405 | 7,568 | 8,046 | Pulau Harapan | 4 | 92616 | |
| Totals | 819.96 | 228,936 | 259,478 | 273,559 | Sinjai | 80 |
Notes: (a) including 2 kelurahan. (b) including one kelurahan. (c) all 6 are kelurahan.