Sumenep, officially the Sumenep Regency, was previously known as Samanap or Zamanap in English, is a regency of the East Java province, Indonesia. It has an area of 2,093.47 square kilometres (808.29 sq mi) and the population of 1,142,210 (comprising 551,366 males and 590,844 females) as of 2023. The administrative capital is Kota Sumenep, has a name that reflects it is historical and cultural evolution. Formerly, the area was briefly known as Sungeneb in the 13th century, Purwareja in the 15th century, and Sumekar in the 16th century.

The regency occupies the eastern end of Madura island and also includes numerous smaller islands to the east (primarily Talango Island, the Sapudi Islands, and the Kangean Islands), to the north (the Masalembu Islands), and to the south (the Giligenteng Islands) of Madura. It is bordered by the Pamekasan Regency to the west, Madura Strait to the south, and the Java Sea to the north and east. The airport nearby is Trunojoyo Airport with flights to Surabaya.

Sumenep Regency is located at the eastern end of Madura Island; it also includes 126 scattered islands located between 113 ° 32'54 "-116 ° 16'48" East Longitude and between 4 ° 55'-7 ° 24 'South latitude. The regency is bordered to the south by the Strait of Madura and the Bali Sea, to the north by the Java Sea, to the west by Pamekasan Regency (the only land border), and to the east by the Java Sea and the Flores Sea.

The total land area of Sumenep Regency is 2,093.47 km: this was formerly quoted as comprising 179.32 km of settlements, 423.96 km of forest, 14.68 km of grass area or vacant land, 1,130.19 km of farm/moor/bush/field, 59.07 km of pool/aquaculture/brackish water/lakes/reservoirs/wetlands, and 63.41 km of "other" areas. The marine area of Sumenep Regency, with its vast diversity of marine resources and potential for fishery, is about 9,319.65 km.

Sumenep has a tropical savanna climate (Aw) with May to November and heavy rainfall from December to April.

Sumenep Regency is divided into twenty-seven districts (kecamatan), listed below with their areas and their populations at the 2010 census and the 2020 census, together with the official estimates as of mid-2023. The table also includes the location of the district administrative centres, the number of administrative villages in each district (totaling 328 rural desa and 4 urban kelurahan - the latter all in Kota Sumenep District), and their postcodes.

Sumenep Regency, besides including the eastern quarter of Madura Island, also includes many offshore islands - notably the Kangean Islands to the east of Madura, the smaller Sapudi Islands lying between Madura and the Kangean Islands, and Talango Island closer to Madura; it also includes the small Masalembu Islands to the north (between Madura and Kalimantan) and the Giligenteng Islands to the southeast of Madura. The mainland (i.e. the area on Madura Island itself) covers 1,156.07 km (with 808,553 inhabitants in mid 2023) consisting of 18 districts, while the various islands are 937.40 km in area (with 333,657 people in mid 2023), comprising 9 districts, with 128 islands, 46 inhabited.

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n 2010 census	Pop'n 2020 census	Pop'n mid 2023 estimate	Admin centre	No. of villages	Post codes
35.29.11	Pragaan	57.84	65,152	65,764	67,193	Pragaan Laok	14	69465
35.29.05	Bluto	51.25	45,142	47,025	49,319	Bunbungan	20	69466
35.29.06	Saronggi	67.71	34,282	36,880	38,607	Tanah Merah	14	69467
35.29.08	Giligenteng (islands)	30.32	26,524	24,411	24,534	Aenganyar	8	69482
35.29.04	Talango (island)	50.27	36,737	38,400	38,743	Talango	8	69481
35.29.02	Kalianget	30.19	39,253	41,713	42,791	Kalianget Timur	7	69471
35.29.01	Kota Sumenep	27.84	70,744	75,367	76,409	Pamolokan	16	69412 - 69417
35.29.26	Batuan	27.10	12,097	13,412	13,591	Batuan	7	69451
35.29.07	Lenteng	71.41	56,777	61,073	62,574	Ellak Laok	20	69461
35.29.10	Ganding	53.97	35,671	36,571	36,989	Ketawang Larangan	14	69462
35.29.09	Guluk Guluk	59.57	50,803	50,384	50,357	Guluk-Guluk	12	69463
35.29.13	Pasongsongan	119.03	43,221	51,713	51,945	Panaongan	10	69457
35.29.12	Ambunten	50.54	37,702	40,048	40,894	Ambunten Timur	15	69455
35.29.15	Rubaru	84.46	36,453	39,224	40,343	Rubaru	11	69456
35.29.14	Dasuk	64.50	29,420	30,078	31,102	Kerta Timur	15	69454
35.29.03	Manding	68.88	27,922	29,716	30,467	Manding Laok	11	69452
35.29.17	Batuputih	112.31	42,482	43,551	44,894	Batuputih Laok	14	69453
35.29.19	Gapura	65.78	36,771	37,191	38,751	Gapura Barat	17	69472
35.29.16	Batang Batang	80.36	51,948	54,277	55,402	Batang-Batang Daya	16	69473
35.29.17	Dungkek	63.36	36,115	35,518	36,637	Dungkek	15	69474
	Sapudi Islands:	(167.41)	(82,024)	(85,284)	(77,664)		(27)
35.29.21	Nonggunong	40.08	13,194	13,643	13,479	Sokarame Paseser	8	69484
35.29.20	Gayam	88.40	32,303	32,059	32,020	Pancor	10	69483
35.29.22	Raas	38.93	36,527	39,582	32,165	Brakas	9	69485
	Kangean Islands:	(652.53)	(123,367)	(161,056)	(169,780)		(37)
35.29.25	Sapeken	205.75	43,117	50,325	54,798	Sapeken	9	69493
35.29.24	Arjasa	241.97	59,702	85,048	88,329	Kalikatak	19	69491
35.29.27	Kangayan	204.81	20,548	25,683	26,653	Kangayan	9	69490
	Masalembu Islands:	(40.85)	(21,705)	(25,809)	(26,002)		(4)
35.29.23	Masalembu	40.85	21,705	25,809	26,002	Suka Jeruk	4	69492

Note: (a) comprising 4 kelurahan (Bangselok, Karangduak, Kepanjin and Pajagalan) and 12 desa.
(b) includes the island of Gili Iyang (also known as Pulau Oksigen) east of Madura, with an area of 9.15 km and an estimated mid-2023 population of about 8,600 people in 2 desa (Bancamara in the south and Banraas in the north).

The districts are subdivided (as at 2007) into:

• Villages: 328 rural desa and 4 urban kelurahan (all 4 kelurahan are in Kota Sumenep District)
• Pillars of Citizens (RW): 1,774
• Neighborhoods (RT): 5,569

• East Java Government website
• Sumenep Regency Government website