| Box Width: | 22em |
| Color: | f04938 |
| Sinansan Line | |
| Native Name: | Sinansan-seon |
| Type: | Rapid transit |
| System: | Seoul Metropolitan Subway |
| Status: | Under Construction |
| Start: | Yeouido |
| End: | Jungang (Songsan) |
| Stations: | 13 (17) |
| Open: | April 2025 |
| Linelength: | 46.9km (29.1miles) |
| Tracks: | 2 |
| Map State: | collapsed |
The Sinansan Line (Hangul: 신안산선, Hanja: 新安山線, meaning "New Ansan Line") is the tentative name of a commuter rail line that will eventually link Cheongnyangni station with western Gyeonggi province, passing through key areas of the Seoul metropolitan area, including Yeouido, Yeongdeungpo and Gwangmyeong station.
The forerunner of the Sinansan Line was Line 10, proposed in 1994 as part of Seoul Metro's Phase 3 expansion but was mostly unbuilt due to the 1997 Asian financial crisis.[1] Originally Line 10 was also planned to extend east beyond downtown Seoul going through either Sinchon, Dongnimmun and Hyehwa or pass through Gongdeok, Seoul Station and Dongdaemun Stadium. However, following the restoration of the Cheonggye Stream, under which Line 10 was planned to be laid, the former route seems much more likely.
The Sinansan Line underwent many design changes during planning stages, but generally the line was envisioned to run between Sinpung and Gwangmyeong station. In particular, the section south of Gwangmyeong station has led to heated disputes between the cities of Ansan and Siheung. Ansan has requested for the line to be built almost perfectly south from Gwangmyeong station so it terminates at Hanyang Univ. ERICA Campus, passing through Seongpo-dong on the way. This would also open the possibilities for the trains on this line to travel to Suwon via the Suin Line. The consortium behind the construction of the Sin Ansan Line, however, favors a line running southwest from Gwangmyeong station and joining the Sosa-Wonsi Line, transferring with Line 4 and the Suin Line at Choji station and terminating at southwestern Ansan. The city of Siheung proposed the section in dispute does not even pass through the city of Ansan at all, making the name "Sinansan Line" meaningless. The Siheung plan has the section go west from Gwangmyeong station, intersect the Sosa-Wonsi Line at Siheung City Hall, and terminating at Wolgot station.
Construction was planned to begin in 2015 with the first section of this line (Gwangmyeong station - Yeouido) is set to be opened in 2023.[2] However, contract disputes between the Ministry of Land, Transport and Maritime Affairs and the preferred operator delayed the project and lead to a retendering.[3] [4]
Construction of Phase 1 (Yeouido to Hanyang University/Songsan stations) began 2019 September 9.[5]
NOTE: The Ministry of Land, Transport and Maritime Affairs announced the station list on December 15, 2010, routes are finally announced on 2015.
| Station Number | Station Name English | Station Name Hangul | Station Name Hanja | align=center | EX[6] | Transfer | Station Type | Location | |
| Seoul Station (planned) | Korean: [[:ko:서울역|서울]] | -驛 | Underground | Seoul | Jung-gu | ||||
| Gongdeok (planned) | Korean: [[:ko:공덕역|공덕]] | 孔德 | Underground | Mapo-gu | |||||
| Yeouido (2024) | Korean: [[:ko:여의도역|여의도]] | 汝矣島 | align=center | ● | Underground | Yeongdeungpo-gu | |||
| Yeongdeungpo (2024) | Korean: [[:ko:영등포역|영등포]] | 永登浦 | align=center | ● | Underground | ||||
| Dorimsageori (2024) | 도림사거리 | 道林사거리 | align=center | |||Underground|-||Sinpung (2024)|Korean: [[:ko:신풍역|신풍]]|新豊| align=center | ●||Underground|-||Daerimsamgeori (2024)|대림삼거리|大林삼거리| align=center | |||Underground| rowspan = "2" align=center | Guro-gu|-||Guro Digital Complex (2024)|Korean: [[:ko:구로디지털단지역|구로디지털단지]]|九老디지털團地| align=center | ●||Underground|-||Sindoksan (2024)|신독산|新禿山| align=center | | | Underground | Geumcheon-gu | |||
| Siheungsageori (2024) | 시흥사거리 | 始興사거리 | align=center | |||Underground|-||Seoksu (2024)|Korean: [[:ko:석수역|석수]]|石水| align=center | ●||Underground|-||Gwangmyeong (2024)|Korean: [[:ko:광명역|광명]]|光明| align=center | ●|KTX Gyeongbu, Honam & Gwangmyeong Shuttle (2026)|Underground| rowspan = "6" width = "75pt" align=center | Gyeonggi-do| rowspan = "1" width = "100pt" align=center | Gwangmyeong-si|-||Mokgam (2024)|목감|牧甘| align=center | |||Underground| rowspan = "1" align=center | Siheung-si|-||Seongpo (2024)|성포|聲浦| align=center | |||Underground| rowspan = "4" align=center | Ansan-si|-||Jungang (2024)|Korean: [[:ko:중앙역|중앙]]|中央| align=center | ●| Suin-Bundang Line|Underground|-||Hosu (2024)|Korean: [[:ko:호수역|호수]]|湖水| align=center | | | Underground | ||||
| Hanyang University ERICA Campus(2024) | 한양대에리카캠퍼스 | 漢陽大에리카캠퍼스 | align=center | ● | Underground | ||||
| Station Number | Station Name English | Station Name Hangul | Station Name Hanja | Transfer | Station Type | Location | ||
|---|---|---|---|---|---|---|---|---|
| Gwangmyeong (planned) | 광명 | 光明 | KTX Gyeongbu, Honam & via Gwangmyeong Shuttle (2026) | Underground | Gyeonggi-do | align=center | Gwangmyeong-si | |
| Maehwa | 매화 | (2026) | Underground | Siheung-si | ||||
| Siheung City Hall (planned) | 시흥시청 | 始興市廳 | Seohae Line (2026) | Underground | ||||
| Seonbu (planned) | 선부 | 仙府 | Seohae Line | Underground | Ansan-si | |||
| Choji (planned) | 초지 | 草芝 | & Suin Line | Underground | ||||
| Siu (planned) | 시우 | 時雨 | Seohae Line | Underground | ||||
| Wonsi (planned) | 원시 | 元時 | Seohae Line | Underground | ||||
| USKR (planned) | USKR | USKR | Aboveground | Hwaseong-si | ||||
| Songsan (planned) | 송산 | 松山 | Aboveground | |||||