| Official Name: | Trenggalek |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Jwalita Praja Karana (Brilliant because of the people) |
| Pushpin Map: | Indonesia |
| Coordinates: | -8.05°N 154°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Java |
| Seat Type: | Capital |
| Leader Title: | Regent |
| Leader Name: | M. Nur Arifin[1] |
| Area Footnotes: | [2] |
| Area Total Km2: | 1261.40 |
| Elevation Min M: | 0 |
| Elevation Max M: | 2563 |
| Elevation M: | 110 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 756109 |
| Population Density Km2: | auto |
| Population Footnotes: | [3] |
| Timezone1: | UTC+7 |
Trenggalek Regency (Indonesian: Kabupaten Trenggalek;) is a regency (kabupaten) in East Java, Indonesia.
This regency has an area of 1,261.40 km2 and had a population of 674,411 residents at the 2010 Census[4] and 731,125 at the 2020 Census;[5] the official estimate as of mid-2023 was 756,109.[6] It is located on the southern shore of East Java and is surrounded by three regencies: Ponorogo Regency to the northwest; Pacitan Regency to the southwest; and Tulungagung Regency to the east. The administrative centre is located in the district (kecamatan) of Trenggalek.
Trenggalek is a regency that is located on the southern shore of Java island and has the following geographical boundaries:
The Regency is divided into fourteen districts (kecamatan), tabulated below with their areas and their population totals from the 2010 Census[7] and the 2020 Census,[8] together with the official estimates as of mid-2023.[9] The table also includes the locations of the district headquarters, the number of administrative villages in each district (totaling 152 rural desa and 5 urban kelurahan - the latter all in Trenggalek (town) District), and its postal codes.
| Kode Wilayah | Name of District (kecamatan) | Area in km2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2023 | Admin centre | No. of villages | Post codes | |
|---|---|---|---|---|---|---|---|---|---|
| 35.03.01 | Panggul (a) | 131.56 | 69,325 | 78,344 | 81,492 | Wonocoyo | 17 | 66364 | |
| 35.03.02 | Munjungan (b) | 154.80 | 46,916 | 52,908 | 54,498 | Munjungan | 11 | 66365 | |
| 35.03.08 | Watulimo (c) | 154.44 | 62,625 | 70,002 | 72,855 | Prigi | 12 | 66382 | |
| 35.03.07 | Kampak | 79.00 | 35,743 | 37,201 | 38,453 | Bendoagung | 7 | 66373 | |
| 35.03.04 | Dongko | 141.20 | 59,248 | 65,505 | 68,272 | Dongko | 10 | 66363 | |
| 35.03.03 | Pule | 118.12 | 50,908 | 55,822 | 57,843 | Pule | 10 | 66362 | |
| 35.03.06 | Karangan | 50.92 | 45,432 | 49,930 | 50,853 | Karangan | 12 | 66361 | |
| 35.03.14 | Suruh | 50.72 | 24,546 | 26,028 | 26,795 | Suruh | 7 | 66360 | |
| 35.03.10 | Gandusari | 54.96 | 49,082 | 52,560 | 54,167 | Gandusari | 11 | 66372 | |
| 35.03.13 | Durenan | 57.16 | 48,985 | 51,320 | 51,917 | Kendalrejo | 14 | 66381 | |
| 35.03.12 | Pogalan | 41.80 | 47,951 | 52,234 | 53,737 | Ngadirenggo | 10 | 66371 | |
| 35.03.11 | Trenggalek (town) | 61.16 | 62,606 | 64,306 | 66,887 | Ngantru | 15 (d) | 66311 - 66319 | |
| 35.03.05 | Tugu | 74.72 | 45,764 | 47,829 | 49,749 | Gondang | 15 | 66352 (e) | |
| 35.03.09 | Bendungan | 90.84 | 25,280 | 27,136 | 28,591 | Dompyong | 8 | 66351 | |
| Totals | 1,261,40 | 674,411 | 731,125 | 756,109 | 157 |
Notes: (a) including 11 small offshore islands. (b) including 23 small offshore islands. (c) including 23 small offshore islands.
(d) comprising 5 urban kelurahan (Kelutan, Ngantru, Sumbergedong, Surodakan and Tamanan) and 10 desa.
(e) except for the village of Banaran, which has a post code of 66318.
Agricultural produce in the area includes rice, corn, cassava, soya beans,and legumes. Plantations produce sugar cane, cloves, durians, salak, mangosteens, and rambutans. Industrial outputs include soy sauce, syrup, tapioca, anchovies, batik, snacks, cigarettes, sawmill, building materials, roofs, and tofu.
Trenggalek has several tourist sites, including beaches (Pantai), caves, and mountain ranges.[10] [11]