Nagekeo Regency (sometimes written as Nagé Kéo) is a regency on the island of Flores in East Nusa Tenggara province of Indonesia, comprising the Nage people in the south and the Keo in the north (in Aesesa and Wolowae Districts). It covers an area of 1,377.04 km and had a population of 130,120 at the 2010 Census, and 159,732 at the 2020 Census; the official estimate as at mid 2023 was 166,968. The regency was established on 2 January 2007 by separation of the former eastern districts from Ngada Regency; it has its administrative seat (capital) in the town of Mbay on the north coast of Flores. It is bordered to the west by the residual Ngada Regency and to the east by Ende Regency, while to the north is the Flores Sea and to the south is the Savu Sea.

Nagekeo Regency is divided into seven districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census and the 2020 Census, 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 (totaling 97 rural desa and 16 urban kelurahan), and its postal codes.

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 villagwa	Post codes
53.06.04	Mauponggo	100.98	20,561	24,640	25,193	Mauponggo	21	86463
53.16.06	Keo Tengah	67.79	13,428	15,592	16,449	Maundai	16	86464
53.16.02	Nangaroro	251.06	17,172	21,634	21,963	Nangaroro	19	86465
53.16.03	Boawae	324.66	33,917	40,820	41,482	Boawae	27	86462
53.15.07	Aesesa Selatan (South Aesesa)	97.65	6,252	7,379	8,231	Jawakisa	7	86470
53.16.01	Aesesa	391.31	33,901	43,684	47,203	Danga	18	86472
53.16.05	Wolowae	143.59	4,889	5,983	6,447	Marilewa	5	86471
	Totals	1,377.04	130,120	159,732	166,968	Mbay	113

Notes: (a) including the kelurahan of Wuliwalo. (b) including the kelurahan of Nangaroro.
(c) comprising 8 kelurahan (Nageoga, Nagesapadhi, Natanage, Natanage Timur, Olakile, Ratongamobo, Rega and Wolopogo) and 19 desa.
(d) including the offshore islands of Pulau Pasirita and Pulau Watundoa.
(e) comprising 6 kelurahan (Danga, Dhawe, Lape, Mbay I, Mbay II and Towak) and 12 desa. (f) including the offshore island of Pulau Kinde.

In August 2011, Due to long dry season at the location, Australian saltmaker Cheetam Saltworks Ltd. is considering opening a plant in Nagekeo Regency with investment $15 million on a 1,500-hectare plot plus $6 million to build a port and would employ 1,600 people.

Besides pink beach in Komodo National Park area, Flores's other pink beach is in Rii Taa Island, Nagekeo Regency. The island is one hour by traditional fisherman boat from Maropokot small port. At high tide, the island area is only 30 square metres, but at low tide it becomes 20 hectares in area. Popular for local people, but only a few foreign tourists. No shade at all, good for sunbathing in the morning and afternoon.

• Fransisko Kota, Indonesian footballer