| Official Name: | West Seram Regency |
| Native Name: | Kabupaten Seram Bagian Barat |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Saka Mese Nura (Protect and Defend the Island) |
| Coordinates: | -3.1027°N 128.43°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Maluku |
| Seat Type: | Capital |
| Seat: | Piru |
| Leader Title: | Regent |
| Leader Name: | Andi Chandra As'Aduddin |
| Leader Title1: | Vice Regent |
| Leader Name1: | - |
| Area Total Km2: | 6948.4 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 214979 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | IEST |
| Utc Offset1: | +9 |
| Area Code Type: | Area code |
| Area Code: | (+62) 911 |
| Pushpin Map: | Indonesia_Seram#Indonesia_Maluku#Indonesia |
| Pushpin Map Caption: | Location in Seram, Maluku and Indonesia |
| Pushpin Label Position: | right |
West Seram Regency is a regency of Maluku, Indonesia. It is mainly located on Seram, but includes various islands lying to the west of Seram - the largest being Manipa, Kelang and Boano, as well as the smaller islets of Babi, Pua, Masowoi, and Marsegu. It covers a land area of 6,948.40 km2, and had a population of 164,654 at the 2010 Census[2] and 212,393 at the 2020 Census;[3] the official estimate as at mid 2023 was 214,979.[4] The principal town lies at Piru, a port at the northern coast of Latira Bay (Teluk Latira) which is a northwards extension of Piru Bay (Teluk Piru) and almost separates the Huamual Peninsula from the rest of Seram Island. The western sector of the Regency (the Huamual Peninsula and the islands off the west coast) occupies just under 25% of the land area, but held over 42% of the Regency's population at the 2020 Census.
At the time of the 2010 Census the regency was divided into four districts (kecamatan). Subsequent to 2010, seven additional districts have been created by the division of the original four districts, so that the regency is now divided into eleven districts. These are tabulated below with their areas and populations at the 2010 Census[5] and 2020 Census,[6] together with the official estimates as at mid 2023.[7] The table also includes the locations of the district headquarters, as well as the number of administrative villages (all classed as rural desa) in each district, and its postal code.
| 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 code | |
|---|---|---|---|---|---|---|---|---|---|
| 81.06.04 | Huamual Belakang (a) | 409.65 | 25,629 | 33,132 | 35,229 | Waesala | 7 | 97567 | |
| 81.06.09 | Kepulauan Manipa (Manipa Islands) (b) | 159.71 | 5,810 | 7,165 | 7,793 | Masawoi | 7 | 97569 | |
| 81.06.08 | Huamual (c) | 1,162.99 | 34,919 | 49,097 | 46,967 | Luhu | 5 | 97560 | |
| Totals of Western sector | 1,732.35 | 66,358 | 89,394 | 89,989 | 19 | ||||
| 81.06.02 | Seram Barat (West Seram) | 503.33 | 27,311 | 35,045 | 35,598 | Piru | 7 (d) | 97562 | |
| 81.06.01 | 329.65 | 23,240 | 27,040 | 26,717 | Kairatu | 7 | 97566 | ||
| 81.06.07 | Kairatu Barat (d) (West Kairatu) | 132.25 | 13,146 | 14,478 | 14,160 | Kamal | 6 | 97568 | |
| 81.06.06 | Inamosol (e) | 504.61 | 5,311 | 6,422 | 6,777 | Honitetu | 5 | 97565 | |
| 81.06.05 | Amalatu (e) | 665.35 | 10,979 | 12,537 | 13,131 | Latu | 7 | 97563 | |
| 81.06.11 | Elpaputih (e) | 1,165.74 | 1,453 | 5,233 | 5,105 | Elpaputih | 7 | 97564 | |
| 81.06.03 | 1,181.32 | 12,133 | 15,448 | 16,047 | Taniwel | 19 | 97559 | ||
| 81.06.10 | Taniwel Timur (f) (East Taniwel) | 733.80 | 5,375 | 6,796 | 7,455 | Uwen Pantai | 15 | 97561 | |
| Totals of Eastern sector | 5,216.05 | 98,948 | 122,999 | 124,990 | 73 | ||||
| Totals | 6,948.40 | 164,654 | 212,393 | 214,979 | 92 |
Notes: (a) Huamual Belakang District includes Boano and Kelang Islands, as well as Babi (a small island situated between Kelang Island and Seram), Pua (a small island off Boano) and 26 other small islands, as well as part of the 'mainland' of Seram (the 2 desa of Waesala and Allang Asaude).
(b) Manipa Islands District consists of the main island of Manipa together with adjacent small islands; it was formerly part of Huamual Belakang District.
(c) formerly part of Seram Barat District; in the north it is now bordered by Huamual Belakang and Seram Barat Districts, in the south it is bordered by the Banda Sea, in the east it is bordered by Seram Barat District, and in the west it is bordered by the Manipa Passage. The district comprises 5 towns and villages (all desa) - Lohu (with 26,184 inhabitants in mid 2022), Lokki (12,568), Iha (6,210), Ariate (1,182) and Kulur (918).
(d) the 7 desa are Piru (a town with 16,368 inhabitants in mid 2022), Kaibobo, Eti, Lumoli, Morekau, Neniari and Kawa.
(e) formerly part of Kairatu District. (f) formerly part of Taniwel District.