Southwest Sumba Regency

Southwest Sumba Regency
Kabupaten Sumba Barat Daya
Mandorak beach
Motto(s): 
Loda Wee Maringi Pada Wee Malala,
(Blessed land, briskly place)
Location within East Nusa Tenggara
Southwest Sumba Regency
Southwest Sumba Regency
Southwest Sumba Regency (Lesser Sunda Islands)
Southwest Sumba Regency
Southwest Sumba Regency (Indonesia)
Coordinates: 9°33′44″S 119°05′21″E / 9.5622°S 119.0891°E / -9.5622; 119.0891
Country Indonesia
RegionLesser Sunda Islands
Province East Nusa Tenggara
CapitalTambolaka
Government
 • RegentRatu Ngadu Bonu Wulla
 • Vice RegentDominikus Alphawan Rangga Kaka
Area
 • Total
1,381.94 km2 (533.57 sq mi)
Population
 (mid 2025 estimate)
 • Total
335,500
 • Density242.8/km2 (628.8/sq mi)
Area code(+62) 387
Websitesbdkab.go.id

Southwest Sumba Regency (Indonesian: Kabupaten Sumba Barat Daya) is a regency on Sumba Island in East Nusa Tenggara province of Indonesia. Established on 2 January 2007 out of parts of West Sumba Regency, the regency has its seat (capital) in Tambolaka (part of the town of Waitabula in the north), while Bondokodi in the largest village in the west. Its population was 283,818 in the 2010 decennial census and had risen to 303,650 at the 2020 census; the official estimate as at mid 2024 was 335,500 (comprising 171,513 males and 163,987 females.