Seoul Subway Line 8

{{short description|Subway line in Gyeonggi-do and Seoul, South Korea}}

{{Infobox rail line

| box_width = 250px

| color = {{rcr|Seoul Metropolitan Subway|8}}

| name = Line 8

| native_name = {{Lang|ko|8호선(八號線)}}
Pal Hoseon

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| image = 250px

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| type = Rapid transit

| system = Seoul Metropolitan Subway

| status = Operational

| locale =

| start = Byeollae

| end = Moran

| stations = 30{{cite web|url=http://www.smrt.co.kr/main/publish/view.jsp?menuID=002005006|title=Operation Status|publisher=Seoul Metropolitan Rapid Transit|access-date=2014-08-15|archive-url=https://web.archive.org/web/20140727013901/http://www.smrt.co.kr/main/publish/view.jsp?menuID=002005006|archive-date=2014-07-27|url-status=dead}}

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| open = {{Start date|1996|11|23|df=y}}{{cite web|url=http://www.smrt.co.kr/main/publish/view.jsp?menuID=002005004|title=History|access-date=2014-07-25|publisher=Seoul Metropolitan Rapid Transit|archive-url=https://web.archive.org/web/20140727130544/http://www.smrt.co.kr/main/publish/view.jsp?menuID=002005004|archive-date=2014-07-27|url-status=dead}}

| operator = Seoul Metro

| character =

| depot = Jamsil

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| linelength_km =

| linelength = {{convert|30.1|km|abbr=on}}

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| tracks = 2

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| mapcolor = Pink

| electrification = {{1,500 V DC}} overhead catenary

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| map = {{Seoul Subway Line 8 route diagram|inline=2}}{{hr}}250px

| map_state = collapsed

}}

Seoul Subway Line 8 of the Seoul Metropolitan Subway was built from 1990 to 1999 and mainly serves the southeastern parts of Seoul and Seongnam. The first section from Jamsil to Moran opened in 1996, and the second section from Moran to Amsa was opened in July 1999. The line color is rose. In 2019, Line 8 had an annual ridership of 112 million or about 307,000 people per day.{{Cite web|title=서울시 지하철수송 통계|url=http://data.seoul.go.kr/dataList/273/S/2/datasetView.do#none|access-date=2021-05-21|website=data.seoul.go.kr|language=ko}} At {{convert|17.7|km|abbr=on}} in length, Line 8 is the shortest of all heavy rail Seoul Metropolitan Subway lines.

In 2014, construction was planned to begin in order to extend the line north of the Han River through Guri station to Byeollae station on the Gyeongchun Line in Namyangju-si, Gyeonggi-do; construction began in October 2015. The extension added {{convert|11.37|km|mi|abbr=on|sp=us|disp=}} of line to the already existing {{convert|17.7|km|mi|abbr=on|sp=us|disp=}}.{{Cite web | last =Bak | first =Yongson | title =경기북부 연장 광역전철 '윤곽 잡혔다' | publisher=Yonhap News Agency | date =2011-05-04 | url =http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=100&oid=001&aid=0005046357 | access-date = 7 September 2011}}{{Cite web |last=Jung-joo |first=Lee |date=2024-05-23 |title=Seoul Metro's Line No. 8 to extend its routes in August |url=https://www.koreaherald.com/view.php?ud=20240523050542 |access-date=2024-06-19 |website=The Korea Herald |language=en}} with operation beginning on August 10, 2024.{{cite web | title=Seoul's line No. 8 to begin service to Gyeonggi's Byeollae Station from Saturday | website=Korea JoongAng Daily | date=2024-08-08 | url=https://koreajoongangdaily.joins.com/news/2024-08-08/national/socialAffairs/Seouls-line-No-8-to-begin-service-to-Gyeonggis-Byeollae-Station-from-Saturday/2108880 | access-date=2025-04-05}}{{cite web | title=New 'Byeollae Line' of Subway Line 8 Begins Operation | website=KBS WORLD Radio | date=2024-08-10 | url=https://world.kbs.co.kr/service/news_view.htm?Seq_Code=187230 | access-date=2025-04-05}}

Another northern extension is planned to bring the line to ByeollaeByeolgaram station on Seoul Subway Line 4.{{Cite web|url=https://www.news1.kr/articles/2694643|title=남양주 '별내선-진접선 환승' 수도권 동북부 순환철도망 구축|date=June 17, 2016|website=뉴스1}}{{Cite web|url=https://www.fnnews.com/news/202111080514092959|title=남양주시 "별내선(8호선) 연장 예타대상 선정"|date=November 8, 2021|website=The Financial News}}

The southern end is planned to be extended {{convert|3.9|km|mi|abbr=on|sp=us|disp=}} to Pangyo station.