Central Sumba Regency (Indonesian: Kabupaten Sumba Tengah) is a regency in East Nusa Tenggara of Indonesia. The new Central Sumba Regency was established on the island of Sumba when West Sumba Regency was split into two regencies on 22 May 2007 and a further Regency was created in Central Sumba from parts of both West Sumba and East Sumba Regencies. The new Regency covers 1,845.28 km and had a population of 62,485 at the 2010 Census and 85,482 at the 2020 Census; the official estimate as at mid 2023 was 91,531. The seat (capital) of its government is located at Waibakul.

The Central Sumba Regency (following the re-organisation of 22 May 2007 which created it out of parts of both West Sumba Regency and East Sumba Regency) was composed of five districts (kecamatan), but a sixth district (Umbu Ratu Nggay Tengah) has since been created by taking 7 villages from Umbu Ratu Nggay District and 3 villages from Umbu Ratu Nggay Barat District. The areas (in km) and populations of these districts at the 2010 Census and the 2020 Census are listed below, together with the official estimates as at mid 2023. The table also includes the locations of the district administrative centres, the number of administrative villages in each district (all classed as rural desa), and its postal code.

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n Census 2010	Pop'n Census 2020	Pop'n Estimate mid 2023	Admin centre	No. of villages	Post code
53.17.01	Katikutana	70.27	9,733	13,837	13,791	Anakalang	7	87282
53.17.05	Katikutana Selatan (South Kalikutana)	383.96	10,095	14,755	15,599	Waikabeti	9	87280
53.17.02	Umbu Ratu Nggay Barat (West Umbu Ratu Nggay)	220.31	16,223	21,507	20,117	Maderi	15	87281
53.17.04	Umbu Ratu Nggay	629.62	12,264	16,306	12,258	Lendi Wacu	11	87283
53.17.06	Umbu Ratu Nggay Tengah (Central Umbu Ratu Nggay)	206.77			9,029	Bolubokat	10	87283
53.17.03	Mamboro	334.35	14,170	19,077	20,737	Mananga	13	87258
	Totals	1,845.28	62,485	85,482	91,531	Waibakul	65

Note: (a) The populations at the 2010 and 2020 Censuses of the villages now forming the new Central Umbu Ratu Nggay District are included with the figures for the two districts from which they were cut out.

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