| Official Name: | Lower Indragiri Regency |
| Native Name: | Kabupaten Indragiri Hilir |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Berlayar sampai ke Pulau, Berjalan sampai ke Batas |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Riau |
| Seat Type: | Regency seat |
| Seat: | Tembilahan |
| Leader Title: | Regent |
| Leader Name: | Prof. Dr. Andre Syahputra, M.Sc |
| Area Total Km2: | 13136.14 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 695571 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | WIB |
| Utc Offset1: | +7 |
| Website: | www.inhilkab.go.id |
Indragiri Hilir (or Lower Indragiri) is the most eastern regency (kabupaten) of Riau Province, Indonesia. It is located on the island of Sumatra. The regency has an area of 13,136.14 km2 and had a population of 661,779 at the 2010 census[2] and 654,909 at the 2020 Census;[3] the official estimate as at mid 2023 was 695,571 (comprising 358,807 males and 336,764 females).[4] The administrative centre of the regency is the town of Tembilahan.
The regency is divided into twenty districts (kecamatan), listed below with their areas and their populations at the 2010 census[5] and the 2020 census,[6] together with the official estimates as at mid 2023.[7] The table also includes the locations of the district administrative centres, the number of administrative villages in each district (totaling 197 rural desa and 39 urban kelurahan), and its post code.
| Kode Wilayah | Name of District (kecamatan) | Area in km2 | Pop'n census 2010 | Pop'n census 2020 | Pop'n estimate mid 2022 | Admin centre | No. of desa | No. of kelurahan | Post code | |
|---|---|---|---|---|---|---|---|---|---|---|
| 14.04.09 | Keritang | 898.53 | 61,420 | 63,103 | 67,237 | Kotabaru Reteh | 16 | 1 | 29275 | |
| 14.04.14 | Kemuning | 901.90 | 29,647 | 38,499 | 42,910 | Selensen | 11 | 1 | 29274 | |
| 14.04.01 | Reteh | 500.69 | 42,213 | 35,974 | 36,855 | Pulau Kijang | 11 | 3 | 29273 | |
| 14.04.20 | Sungai Batang | 328.09 | 11,837 | 10,066 | 10,347 | Benteng | 7 | 1 | 29270 | |
| 14.04.02 | Enok | 530.23 | 32,987 | 33,846 | 36,073 | Enok | 10 | 4 | 29272 | |
| 14.04.10 | Tanah Merah | 470.57 | 29,820 | 25,236 | 26,377 | Kuala Enok | 9 | 1 | 29271 | |
| 14.04.03 | Kuala Indragiri | 696.29 | 18,733 | 14,679 | 16,052 | Sapat | 7 | 1 | 29280 | |
| 14.04.18 | Concong | 266.71 | 12,852 | 11,764 | 11,890 | Concong Luar | 5 | 1 | 29281 | |
| 14.04.04 | 162.14 | 69,498 | 77,862 | 82,291 | Tembilahan Hilir | - | 8 (a) | 29211, 29212 and 29214 | ||
| 14.04.13 | Tembilahan Hulu | 127.52 | 42,675 | 46,662 | 50,289 | Tembilahan Hulu | 4 | 2 | 29213 | |
| 14.04.05 | Tempuling | 553.47 | 29,584 | 31,633 | 34,971 | Sungai Salak | 5 | 4 | 29262 | |
| 14.04.19 | Kempas | 596.50 | 32,641 | 38,671 | 40,909 | Harapan Tani | 10 | 2 | 29261 | |
| 14.04.11 | Batang Tuaka | 421.23 | 26,412 | 27,190 | 29,471 | Sungai Piring | 12 | 1 | 29252 | |
| 14.04.06 | Gaung Anak Serka | 621.14 | 21,252 | 22,591 | 24,070 | Teluk Pinang | 9 | 3 | 29253 | |
| 14.04.12 | Gaung | 2,182.80 | 38,573 | 38,367 | 42,447 | Kuala Lahang | 15 | 1 | 29282 | |
| 14.04.07 | Mandah | 857.14 | 38,247 | 34,531 | 38,517 | Khairiah Mandah | 16 | 1 | 29254 | |
| 14.04.08 | Kateman | 563.16 | 43,783 | 39,284 | 43,303 | Tagaraja | 8 | 3 | 29255 | |
| 14.04.15 | Pelangiran | 1,351.26 | 41,918 | 35,318 | 32,035 | Pelangiran | 15 | 1 | 29257 | |
| 14.04.16 | Teluk Balengkong | 575.26 | 16,126 | 9,229 | 9,153 | Saka Rotan | 13 | - | 29258 | |
| 14.02.17 | Pulau Burung | 531.49 | 21,561 | 20,404 | 20,374 | Pulau Burung | 14 | - | 29256 | |
| Totals | 13,136.14 | 661,779 | 654,909 | 695,571 | Tembilahan | 197 | 39 |
Note: (a) comprising the 8 kelurahan of Pekan Arba, Seberang Tembilahan, Sungai Beringin, Sungai Perak, Tembilahan Hilir, Tembilahan Kota, Seberang Tembilahan Barat and Seberang Tembilahan Selatan.
The only public airport in Indragiri Hilir is Tempuling Airport. There is also a private airport located in Pelangiran District owned by PT THIP.