| Official Name: | South Buru Regency |
| Native Name: | Kabupaten Buru Selatan |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Lolik Lalen Fedak Fena (Unite Hearts to Build the Nation) |
| Coordinates: | -3.85°N 168°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Maluku |
| Seat Type: | Capital |
| Seat: | Namrole |
| Leader Title: | Regent |
| Leader Name: | Tagop Sudarsono Soulisa |
| Leader Title1: | Vice Regent |
| Leader Name1: | Buce Ayub Seleky |
| Area Total Km2: | 5060 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 79017 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | IEST |
| Utc Offset1: | +9 |
| Area Code Type: | Area code |
| Area Code: | (+62) 913 |
| Pushpin Map: | Indonesia_Maluku#Indonesia |
| Pushpin Map Caption: | Location in Maluku and Indonesia |
South Buru Regency is a regency of Maluku, Indonesia. It was created on 24 June 2008 by being split off from the existing Buru Regency. It is located on the island of Buru, of which it comprises the southern 40%. The Regency (which includes the smaller island of Ambalau to the southeast of Buru Island) covers an area of 5,060 km2, and it had a population of 53,671 at the 2010 Census,[2] rising to 75,410 at the 2020 Census;[3] the official estimate as at mid 2023 was 79,017 (comprising 39,952 males and 39,065 females).[4] The principal town lies at Elfule in Namrole District.
At the time of the 2010 Census the regency was divided into five districts (kecamatan), but a sixth district (Fena Fafan) has been added by the splitting of the existing Leksula District. The six districts are 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 headquarters, the number of administrative villages (all rated as rural desa) in each district, and its postal codes.
| 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 codes | |
|---|---|---|---|---|---|---|---|---|---|
| 81.09.04 | Kepala Madan (a) | 1,276.00 | 9,411 | 12,210 | 12,991 | Biloro | 16 | 97541 | |
| 81.09.05 | Leksula (b) | 1,899.61 | 14,900 | 14,071 | 14,267 | Leksula | 19 | 97543 | |
| 81.09.06 | Fena Fafan | 528.39 | (c) | 3,904 | 4,309 | Waekatin | 11 | 97542 | |
| 81.09.01 | Namrole (d) | 326.00 | 10,809 | 20,874 | 22,373 | Elfule | 17 | 97544 | |
| 81.09.02 | Waesama (e) | 724.00 | 11,505 | 15,196 | 15,853 | Wamsisi | 11 | 97545 | |
| 81.09.03 | Ambalau (island) | 306.00 | 6,846 | 9,155 | 9,225 | Siwar | 7 | 97546 | |
| Totals | 5,060.00 | 53,671 | 75,410 | 79,017 | Namrole | 81 |
Notes: (a) including three offshore islands. (b) including fifteen offshore islands. (c) the 2010 population of Fena Fafan District is included with the figure for Leksula District. (d) including four offshore islands. (e) including three offshore islands.
Namrole, the seat of the regency has a tropical rainforest climate (Af) moderate rainfall from October to March and heavy to very heavy rainfall from April to September. Unlike most parts of Indonesia, the southern part of Buru island experiences a rainfall maximum during the low-sun season due to local wind currents.