West Sumba Regency

West Sumba Regency is a regency in East Nusa Tenggara Province of Indonesia. Established in 1958,
the regency was considerably reduced on 2 January 2007 with the creation of new Regencies on Sumba Island under Law UU No.16 of that year. Its area is now 737.42 km², and its population was 110,993 at the 2010 census and 145,097 at the 2020 Census; the official estimate as at mid 2024 was 155,013. It has its seat in Waikabubak.
The region is rather dry. One of the main problems for people living in rural areas in the province is frequent shortages of water. Although there are some local supplies of water from wells and springs, water from these sources often becomes scarce during the long dry seasons. In some villages local non-government organisations, some supported with international assistance, support small projects to improve village water supplies.

Administrative districts

The West Sumba Regency is now composed of six districts, whose areas and populations at the 2010 Census and 2020 Census, are listed below, together with the official estimates as at mid 2024. The table also includes the locations of the district headquarters, the number of administrative villages in each district, and its postal code.

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
53.12.12	Lamboya	125.65	15,856	22,059	24,093	Kabukarudi	11	87271
53.12.11	Wanokata	133.68	14,163	18,811	20,180	Pogo Katoda	14	87272
53.12.18	Laboya Barat	161.23	7,327	8,815	9,101	Hodi	4	87270
53.12.10	Loli	132.36	27,103	38,932	43,050	Dokakaka	14	87284
53.12.15	Kota Waikabubak	44.71	28,874	33,064	33,491	Waikabubak	13	87211 - 87217
53.12.04	Tana Righu	139.79	17,670	23,416	25,098	Malata	18	87257
	Totals	737.42	110,993	145,097	155,013	Waikabubak	74	-

Notes: comprising 5 kelurahan and 9 desa.
comprising 6 kelurahan and 7 desa.

Villages

Villages in the area include:

Tourism

In 2016 and 2017 Travel + Leisure magazine gave the title of World's Best Hotel to Nihiwatu Resort. The hotel is one of the leading sectors for ecotourism.

Climate

Waikabubak has a tropical monsoon climate with moderate to little rainfall from June to September and heavy to very heavy rainfall from October to May.