| Box Width: | 22em |
| Line 2 | |
| Native Name: | I Hoseon |
| Logo2: | Seoul Metro Line 2.svg |
| Logo Width2: | 40px |
| Type: | Rapid transit |
| System: | Seoul Metropolitan Subway |
| Status: | Operational |
| Start: | City Hall / Seongsu / Sindorim |
| End: | City Hall / Sinseol-dong / Kkachisan |
| Stations: | 51 |
| Operator: | Seoul Metro |
| Linelength: | 60.2km (37.4miles) |
| Tracks: | 2 |
| Electrification: | overhead catenary |
| Speed: | 90km/h |
| Map State: | collapsed |
Seoul Subway Line 2 (Korean: 서울 지하철 2호선), also known as the Circle Line, is a circular line of the Seoul Metropolitan Subway. The line running clockwise is called the "inner circle line" and the counter-clockwise line is called the "outer circle line". This is Seoul's most heavily used line, and consists of the main loop (48.8km (30.3miles)), the Seongsu Branch (5.4km (03.4miles)) and the Sinjeong Branch (6km (04miles)) for a total line length of 60.2km (37.4miles). The Line 2 loop is the third longest subway loop in the world after Moscow Metro Bolshaya Koltsevaya line and Beijing Subway Line 10.[1] In 2019, Line 2 had an annual ridership of 812 million passengers or 2.2 million passengers per day.[2]
Headways on the line vary from 2 minutes 18 seconds on peak periods [3] and 5–6 minutes off-peak periods. The line connects the city centre to Gangnam, Teheran Valley and the COEX/KWTC complex.
In 1972, then-Mayor of Seoul (1932–1996) changed the existing plans for the Seoul Subway to better enable connectivity around the growing Seoul City and allow for development to take place across the Seoul Capital Area. Line 2 was built in 1978–84 together with the Seongsu Branch (the second Sinjeong Branch was built 1989–95). Dangsan bridge was closed for reconstruction in 1996 and reopened November 22, 1999. The old steel girder bridge was replaced by a 1.3km (00.8miles) long concrete bridge between Dangsan on the southern side of the river and Hapjeong on the northern bank.
Yongdu station on the Seongsu Branch (between Sindap and Sinseol stations) is the first station in the Seoul Subway system with operating platform screen doors. As of 2008 platform screen doors are operating at all stations along Line 2. New rolling stock has also progressively came on line, replacing older vehicles.
In December 2010 the line is recorded as having the highest WiFi data consumption in the Seoul Metropolitan area. It averaged 2.56 times more than the other 14 subway lines fitted with WiFi service zones.[5]
In 2011, retailer Homeplus opened the world's first virtual supermarket at Seolleung station, where smartphone users can photograph the bar code of life-size pictures, on the walls and platform screen doors, of 500 items of food, toiletries, electronics etc., for delivery within the same day.[6]
All stations on all branches are in Seoul.
| Station Number | Station Name | Station Name | Station Name | Transfer | Distance | Total Distance | Location | ||
|---|---|---|---|---|---|---|---|---|---|
| City Hall | Korean: [[:ko:시청역 (서울)|시청]] | ||||||||
| Euljiro 1(il)-ga (Hana Bank) | Korean: [[:ko:을지로입구역|을지로입구]] <br /><small>([[:ko:을지로입구역|하나은행]])</small> | ||||||||
| Euljiro 3(sam)-ga (Shinhan Card) | Korean: [[:ko:을지로3가역|을지로3가]] <br /><small>([[:ko:을지로3가역|신한카드]])</small> | ||||||||
| Euljiro 4(sa)-ga (BC Card) | Korean: [[:ko:을지로4가역|을지로4가]] <br /><small>([[:ko:을지로4가역|BC카드]])</small> | ||||||||
| Dongdaemun History & Culture Park (DDP) | Korean: [[:ko:동대문역사문화공원역|동대문역사문화공원]] <br /><small>([[:ko:동대문역사문화공원역|DDP]])</small> | ||||||||
| Sindang | Korean: [[:ko:신당역|신당]] | ||||||||
| Sangwangsimni | Korean: [[:ko:상왕십리역|상왕십리]] | ||||||||
| Wangsimni (Seongdong-gu Office) | Korean: [[:ko:왕십리역|왕십리]] <br><small>([[:ko:왕십리역|성동구청]])</small> | ||||||||
| Hanyang Univ. | Korean: [[:ko:한양대역|한양대]] | ||||||||
| Ttukseom | Korean: [[:ko:뚝섬역|뚝섬]] | 뚝섬 | |||||||
| Seongsu | Korean: [[:ko:성수역|성수]] | (Seongsu branch) | |||||||
| Konkuk Univ. | Korean: [[:ko:건대입구역|건대입구]] | ||||||||
| Guui (Gwangjin-gu Office) | Korean: [[:ko:구의역|구의]] <br><small>([[:ko:구의역|광진구청]])</small> | ||||||||
| Gangbyeon (Dongseoul Bus Terminal) | Korean: [[:ko:강변역|강변]] <br><small>([[:ko:강변역|동서울터미널]])</small> | ||||||||
| Jamsillaru (Suhyup Insurance) | Korean: [[:ko:잠실나루역|잠실나루]]<br /><small>([[:ko:잠실나루역|수협중앙회공제보험]])</small> | 나루 | |||||||
| Jamsil (Songpa-gu Office) | Korean: [[:ko:잠실역|잠실]] <br><small>([[:ko:잠실역|송파구청]])</small> | ||||||||
| Jamsilsaenae | Korean: [[:ko:잠실새내역|잠실새내]] | 새내 | |||||||
| Sports Complex | Korean: [[:ko:종합운동장역|종합운동장]] | ||||||||
| Samseong (World Trade Center Seoul) | Korean: [[:ko:삼성역 (서울)|삼성]] <br><small>([[:ko:삼성역 (서울)|무역센터]])</small> | ||||||||
| Seolleung (Acuon Savings Bank) | Korean: [[:ko:선릉역|선릉]] <br /><small>([[:ko:선릉역|애큐온저축은행]])</small> | ||||||||
| Yeoksam (Centerfield) | Korean: [[:ko:역삼역|역삼]] <br /><small>([[:ko:역삼역|센터필드]])</small> | ||||||||
| Gangnam | Korean: [[:ko:강남역|강남]] | ||||||||
| Seoul Nat'l Univ. of Education (Court & Prosecutors' Office) | Korean: [[:ko:교대역 (서울)|교대]] (Korean: [[:ko:교대역 (서울)|법원·검찰청]]) | ||||||||
| Seocho | Korean: [[:ko:서초역|서초]] | ||||||||
| Bangbae (Baekseok Arts Univ.) | Korean: [[:ko:방배역|방배]] <br /><small>([[:ko:방배역|백석예술대]])</small> | ||||||||
| Sadang | Korean: [[:ko:사당역|사당]] | ||||||||
| Nakseongdae (Ganggamchan) | Korean: [[:ko:낙성대역|낙성대]] <br /><small>([[:ko:낙성대역|강감찬]])</small> | ||||||||
| Seoul Nat'l Univ. (Gwanak-gu Office) | Korean: [[:ko:서울대입구역|서울대입구]] <br><small>([[:ko:서울대입구역|관악구청]])</small> | 서울 | |||||||
| Bongcheon | Korean: [[:ko:봉천역|봉천]] | ||||||||
| Sillim (Yangji Hospital) | Korean: [[:ko:신림역 (서울)|신림]] <br /><small>([[:ko:신림역 (서울)|양지병원]])</small> | ||||||||
| Sindaebang | Korean: [[:ko:신대방역|신대방]] | ||||||||
| Guro Digital Complex (Wonkwang Digital Univ.) | Korean: [[:ko:구로디지털단지역|구로디지털단지]] <br /><small>([[:ko:구로디지털단지역|원광디지털대]])</small> | 디지털 | |||||||
| Daerim (Guro-gu Office) | Korean: [[:ko:대림역|대림]] <br><small>([[:ko:대림역|구로구청]])</small> | ||||||||
| Sindorim | Korean: [[:ko:신도림역|신도림]] | (Sinjeong branch) | |||||||
| Mullae (Kim's Eye Hospital) | Korean: [[:ko:문래역|문래]] <br /><small>([[:ko:문래역|김안과병원]])</small> | ||||||||
| Yeongdeungpo-gu Office | Korean: [[:ko:영등포구청역|영등포구청]] | ||||||||
| Dangsan | Korean: [[:ko:당산역|당산]] | ||||||||
| Hapjeong (Holt Children's Services, Inc) | Korean: [[:ko:합정역|합정]] <br /><small>([[:ko:합정역|홀트아동복지회]])</small> | ||||||||
| Hongik Univ. (Eduwill Academy) | Korean: [[:ko:홍대입구역|홍대입구]] <br /><small>([[:ko:홍대입구역|에듀윌학원]])</small> | ||||||||
| Sinchon | Korean: [[:ko:신촌역 (지하)|신촌]] <br /><small>([[:ko:신촌역 (지하)|지하]])</small> | ||||||||
| Ewha Womans Univ. | Korean: [[:ko:이대역|이대]] | ||||||||
| Ahyeon | Korean: [[:ko:아현역|아현]] | ||||||||
| Chungjeongno (Kyonggi Univ.) | Korean: [[:ko:충정로역|충정로]] <br><small>([[:ko:충정로역|경기대입구]])</small> | ||||||||
| Station Number | Station Name | Station Name | Station Name | Transfer | Distance | Total Distance | Location | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Seongsu | Korean: [[:ko:성수역|성수]] | (Main Line) | ||||||||
| Yongdap | Korean: [[:ko:용답역|용답]] | |||||||||
| Sindap | Korean: [[:ko:신답역|신답]] | |||||||||
| Yongdu (Dongdaemun-gu Office) | Korean: [[:ko:용두역|용두]] <br><small>([[:ko:용두역|동대문구청]])</small> | | ||||||||
| Sinseol-dong | Korean: [[:ko:신설동역|신설동]] | |||||||||
| Station Number | Station Name | Station Name | Station Name | Transfer | Distance | Total Distance | Location | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Sindorim | Korean: [[:ko:신도림역|신도림]] | (Main Line) | ||||||||
| Dorimcheon | Korean: [[:ko:도림천역|도림천]] | |||||||||
| Yangcheon-gu Office | Korean: [[:ko:양천구청역|양천구청]] | |||||||||
| Sinjeongnegeori | Korean: [[:ko:신정네거리역|신정네거리]] | 네거리 | ||||||||
| Kkachisan | Korean: [[:ko:까치산역|까치산]] | 까치 | ||||||||
There is a possible extension currently in the conception stage to extend the Sinjeong Branch to 3.7 km to Gayang Station on Line 9. The path would include a new station named Gangseo-gu Office in between Kkachisan and Gayang.[7]
Five generations of Seoul Metro 2000 series trains have been used on Seoul Subway Line 2. As of, only third, fourth and fifth batch 2000 series trains are in operation (manufactured by Hyundai Rotem and Dawonsys respectively), since all first (MELCO thyristor chopper control) and second batch (GEC Traction/Alstom thyristor chopper control) trains have been retired between 2008 and 2023. All trains are stored and maintained at Sindap Depot on the Seongsu Branch and Sinjeong Depot on the Sinjeong Branch.