Name
|
System
|
Country
|
Stations
|
Length in km (mi)
|
Year of completion
|
Line 6
|
Chengdu Metro
|
China
|
Wangcong Temple – Lanjiagou
|
68.2 (42.4)[1]
|
2020
|
Line 18
|
Guangzhou Metro
|
China
|
Xiancun[2] to Wanqingsha
|
58.3 (36.2)[2]
|
2021
|
Line 3
|
Guangzhou Metro
|
China
|
Airport North – Panyu Square
|
57.93 (36)
|
2005-2018
|
Line 10
|
Beijing Subway
|
China
|
Circle route
|
57.1 (35.5)
|
2008-2013
|
Line 6
|
Beijing Subway
|
China
|
Jin'anqiao – Lucheng
|
53.4 (33.2)
|
2012-2018
|
Seoul Subway Line 5
|
Seoul Metropolitan Rapid Transit Corporation
|
South Korea
|
Banghwa–Hanam Geomdansan
|
51.7 km (32.1 mi) (longest branch)
|
1995-2021
|
Line 2
|
Wuhan Metro
|
China
|
Jinyintan – Fozuling
|
44.347 (27.556)
|
2012-2019
|
Line 8
|
Beijing Subway
|
China
|
Yuzhi Lu – Wufutang
|
42.6 (26.4)
|
2012–2021
|
Line 15
|
Shanghai Metro
|
China
|
Gucun Park – Zizhu Hi-tech Park
|
42.3 (26.3)
|
2021
|
Line 5
|
Chengdu Metro
|
China
|
Jiudaoyan – Huilong
|
42.3 (26.3)
|
2019
|
Line 14
|
Beijing Subway
|
China
|
Dawayao – Shangezhuang
|
42 (26)
|
2015–2021
|
Line 6
|
Tianjin Metro
|
China
|
Nanhezhuang – Lushuidao
|
42 (26)
|
2016–2021
|
Downtown MRT line
|
Mass Rapid Transit (Singapore)
|
Singapore
|
Bukit Panjang – Expo
|
41.9 (26)[3]
|
2013-2017
|
Line 3
|
Nanjing Metro
|
China
|
Xinghuolu – Mozhoudonglu
|
41.5 (25.8)
|
2015
|
Line 4
|
Suzhou Rail Transit
|
China
|
Longdaobang — Tongli
|
41.5 (25.8)
|
2017
|
Serpukhovsko-Timiryazevskaya Line
|
Moscow Metro
|
Russia
|
Altufyevo – Bulvar Dmitriya Donskogo
|
41.5 (25.7)
|
1983-2002
|
Metro Madrid L-12: (Metro Sur)
|
Madrid Metro
|
Spain
|
Circle route
|
40.96 (25.5)
|
2003
|
Toei Oedo Line [citation needed]
|
TMBT Subway
|
Japan
|
Hikarigaoka – Shiodome – Tocho-mae
|
40.7 (25.3)
|
2000
|
Seoul Subway Line 9
|
Seoul Metro Line 9 Corporation
|
South Korea
|
Gimpo Airport – VHS Medical Center
|
40.6 (25.2)
|
2018
|
Line 12
|
Shanghai Metro
|
China
|
Qixin Road – Jinhai Road
|
40.4 (25.1)
|
2015
|
Line 7
|
Beijing Subway
|
China
|
Beijing West railway station - Universal Resort
|
40.3 (25.0)
|
2021
|
Line 4
|
Chengdu Metro
|
China
|
Wansheng – Chengdu University
|
39.3 (24.4)
|
2015-2017
|
Line 7
|
Chengdu Metro
|
China
|
Circle route
|
38.6 (24.0)
|
2017
|
Lyublinsko-Dmitrovskaya Line
|
Moscow Metro
|
Russia
|
Zyablikovo – Seligerskaya
|
38.3 (23.8)
|
1995-2018
|
Kaluzhsko-Rizhskaya Line
|
Moscow Metro
|
Russia
|
Medvedkovo – Novoyasenevskaya
|
37.8 (23.5)
|
1958-1990
|
Line 1
|
Chengdu Metro
|
China
|
Weijianian – Science City
|
37.47 (23.3)
|
2010-2018
|
Line 2
|
Shenzhen Metro
|
China
|
Chiwan – Xinxiu
|
35.78 (22.23)
|
2011
|
Busan Subway Line 2
|
Busan Transportation Corporation
|
South Korea
|
Jangsan–Dongwon
|
35.5 (22.06)
|
1999
|
Seoul Subway Line 6
|
Seoul Metropolitan Rapid Transit Corporation
|
South Korea
|
Eungam Loop – Bonghwasan
|
35.1 (21.81)
|
2001
|
Seoul Subway Line 7 (longest branch)
|
Seoul Metropolitan Rapid Transit Corporation
|
South Korea
|
Cheongdam – Bupyeong-gu Office
|
35.1 (21.7)
|
2012
|
Line 5
|
Tianjin Metro
|
China
|
Beichenkejiyuanbei – Liqizhuangnan
|
34.8 (21.6)
|
2018–2021
|
Line 7
|
Shanghai Metro
|
China
|
Panguang Road – Huamu Road
|
34.4 (21.38)
|
2010
|
M4 (Istanbul Metro)
|
Istanbul Metro
|
Turkey
|
Kadıköy–Sabiha Gökçen Havalimanı
|
34 (21.1)
|
2012–2022
|
Line 8
|
Guangzhou Metro
|
China
|
Wanshengwei—Jiaoxin
|
33.9 (21.1)
|
2010-2020
|
Circle MRT line
|
Mass Rapid Transit (Singapore)
|
Singapore
|
Dhoby Ghaut – HarbourFront
|
33.3 (20.69)[4]
|
2011
|
Metro Madrid L-7
|
Madrid Metro
|
Spain
|
Hospital del Henares – Pitis
|
32.9 (20.5)
|
2007
|
U7
|
Berlin U-Bahn
|
Germany
|
Rathaus Spandau-Rudow
|
31.8 (19.7)[5]
|
1924-1984
|
Line 1
|
Beijing Subway
|
China
|
Pingguoyuan – Dawang Lu
|
31.0 (19.3)
|
1971–2000
|
Line 16
|
Beijing Subway
|
China
|
Bei'anhe – Yuyuantan East Gate
|
31.0 (19.2)
|
2016–2021
|
IND Eighth Avenue Line and IND Fulton Street Line[6]
|
New York City Subway
|
United States
|
Inwood – 207th Street – Grant Avenue
|
30.8 (19.14)
|
1956
|
Line 2 Orange
|
Montreal Metro
|
Canada
|
Côte-Vertu – Montmorency
|
30.8 (19.14)
|
2007
|
Line 2
|
Shanghai Metro
|
China
|
East Xujing – Longyang Road
|
30.2 (18.77)
|
2010
|
Moskovsko-Petrogradskaya Line
|
Saint Petersburg Metro
|
Russia
|
Parnas–Kupchino
|
29.7 (18.54)
|
1961-2006
|
Line 8, Shanghai Metro
|
Shanghai Metro
|
China
|
Shiguang Road – Luheng Road
|
29.7 (18.45)
|
2009
|
Kirovsko-Vyborgskaya Line
|
Saint Petersburg Metro
|
Russia
|
Devyatkino – Prospekt Veteranov
|
29.4 (18.35)
|
1955-1978
|
Line 8
|
Chengdu Metro
|
China
|
(Phase 2 is 7.94 km)
|
29.1 (18.1)
|
2020
|
Line 2
|
Chengdu Metro
|
China
|
Tianhe Road – Chengdu Institute of Public Administration
|
29.0 (18.0)
|
2012–2013
|
Sydney Metro Northwest
|
Sydney Metro
|
Australia
|
Kellyville – Chatswood section
|
28.5 km (17.71 mi)
|
2009–2019
|
Bannan Line (Taipei Metro Blue Line)
|
Taipei Metro
|
Taiwan
|
Dingpu – Taipei Nangang Exhibition Center
|
28.2 (17.6)
|
1999–2015
|
Line 4
|
Beijing Subway
|
China
|
Anheqiao Bei (N) – Gongyi Xiqiao
|
28.2 (17.5)
|
2009-2010
|
Incheon Subway Line 1
|
Incheon Subway
|
South Korea
|
Bakchon – International Business District
|
27.9 (17.42)
|
1999–2009
|
Northern line
|
London Underground
|
United Kingdom
|
Morden – East Finchley
|
27.8 (17.2)
|
1890–1940
|
Line 3
|
Saint Petersburg Metro
|
Russia
|
Begovaya–Rybatskoye
|
27.5 (17.1)
|
1967–2018
|
Tanimachi Line
|
Osaka Metro
|
Japan
|
Dainichi–Nagahara
|
27.1 (16.7)
|
1967–1983
|
Meijo Line [citation needed]
|
Nagoya Municipal Subway
|
Japan
|
Kanayama–Nagoya Dome-mae Yada-Kanayama
|
26.4 (16.4)
|
1965–2004
|
B Line (Red)
|
Los Angeles Metro
|
United States
|
North Hollywood - Union Station
|
26.4 (16.4)
|
1993–2000
|
Line 5 (Saint Petersburg Metro)
|
Saint Petersburg Metro
|
Russia
|
Komendantsky Prospekt – Shushary
|
26.0 (16.2)
|
1997–2019
|
Line 1
|
Suzhou Metro
|
China
|
Mudu – Zhongnan Jie
|
25.7 (16.0)
|
2012
|
Zhonghe-Xinlu Line (Taipei Metro Orange Line)
|
Taipei Metro
|
Taiwan
|
Huilong–Nanshijiao
|
25.1 (15.6) (longest branch)
|
1998–2013
|
Yurakucho Line
|
Tokyo Metro
|
Japan
|
Chikatetsu Narimasu – Tatsumi
|
24.6 (15.3)
|
1974–1988
|
Munich U-Bahn U2
|
Munich U-Bahn
|
Germany
|
Feldmoching – Messestadt Ost
|
24.4 (15.2)
|
1980–2001
|
Yellow Line
|
Delhi Metro
|
India
|
GTB Nagar – Saket
|
24 (14.9)[7][8]
|
2009-2010
|
L-1
|
Madrid Metro
|
Spain
|
Valdecarros – Pinar de Chamartín
|
23.88 (14.84)
|
1919–2007
|
L-6
|
Madrid Metro
|
Spain
|
Circle route
|
23.47 (14.58)
|
1979–2007
|
Line 9
|
Shanghai Metro
|
China
|
Jiuting – Middle Yanggao Road
|
23.3 (14.48)
|
2007–2010
|
Line 1 Green
|
Montreal Metro
|
Canada
|
Angrignon – Honoré-Beaugrand
|
23.26 (14.45)
|
1966–1978
|
Warsaw Metro M1
|
Warsaw Metro
|
Poland
|
Kabaty–Młociny
|
23.1 (14.35)
|
1995–2008
|
Line 2
|
Beijing Subway
|
China
|
Circle route
|
23.1 (14.35)
|
1984–1987
|
Line 9
|
Chengdu Metro
|
China
|
Phase 1 of the second loop line in Chengdu, all underground
|
22.18 km (13.78 mi)
|
2020
|
Line 19
|
Beijing Subway
|
China
|
Mudanyuan – Xingong
|
22.4 (13.9)
|
2021
|
Songshan-Xindian Line (Taipei Metro Green Line)
|
Taipei Metro
|
Taiwan
|
Songshan-Xindian
|
21.3 (13.2)
|
1998–2014
|
Line 4
|
Shanghai Metro
|
China
|
Hailun Road – Yishan Road
|
21.1 (13.11)
|
2005–2007
|
Toei Mita Line
|
Toei Subway
|
Japan
|
Meguro – Shimura-Sakaue
|
21.1 (13.11)
|
1968–2000
|
Victoria line
|
London Underground
|
United Kingdom
|
Walthamstow Central – Brixton
|
21.0 (13.05)
|
1968–1971
|
Line 6, Shanghai Metro
|
Shanghai Metro
|
China
|
Boxing Road – Oriental Sports Center
|
20.34 (12.64)
|
2007–2011
|
Barcelona metro line 1
|
Barcelona Metro
|
Spain
|
Fondo – Hospital de Bellvitge
|
20.20 (12.56)
|
1926-1989
|
Tozai Line [citation needed]
|
Sapporo Municipal Subway [citation needed]
|
Japan
|
Miyanosawa – Shin-Sapporo [citation needed]
|
20.1 (12.4)
|
1976–1999
|
Metro Madrid L-5
|
Madrid Metro
|
Spain
|
Alameda de Osuna – Empalme
|
20.005 (12.5)
|
1968–2006
|
Barcelona metro line 9
|
Barcelona Metro
|
Spain
|
Zona Universitaria – Aeroport T1
|
20.00 (12.5)
|
2004–2016
|
North East MRT line
|
Mass Rapid Transit (Singapore)
|
Singapore
|
HarbourFront–Punggol
|
20.0 (12.43)[9]
|
2003–2011
|
Bucharest Metro Line M3
|
Bucharest Metro
|
Romania
|
Preciziei – Anghel Saligny
|
20.0 (12.43)
|
1983–2008
|
Line 2
|
Tianjin Metro
|
China
|
Caozhuang – Guoshanlu
|
19.7 (12.2)
|
2012–2014
|
Paris Métro Line 9
|
Paris Métro
|
France
|
Pont de Sèvres – Mairie de Montreuil
|
19.6 (12.18)
|
1922–1937
|
Red, Yellow, Blue, and Green Lines
|
Bay Area Rapid Transit, San Francisco
|
United States
|
Balboa Park – West Oakland
|
19.5 (12.12)
|
1973
|
Kol'tsevaya Line
|
Moscow Metro
|
Russia
|
Circle route
|
19.4 (12.2)
|
1950–1954
|
Munich U-Bahn U3
|
Munich U-Bahn
|
Germany
|
Moosach – Fürstenried West
|
19.4 (12.05)
|
1972–2009
|
Line 4
|
Tianjin Metro
|
China
|
Dongnanjiao – Xinxingcun
|
19.4 (12)
|
2021
|
Line 3
|
Tianjin Metro
|
China
|
Huayuan – Tianshili
|
19.2 (11.9)
|
2012–2013
|
Midosuji Line
|
Osaka Metro
|
Japan
|
Nakatsu – Nakamozu
|
19.1 (11.87)
|
1933–1987
|
Barcelona metro line 5
|
Barcelona Metro
|
Spain
|
Vall d'Hebron – Cornella centre
|
19.00 (11.80)
|
1955-2010
|
Mexico City Metro Line 3
|
Mexico City Metro
|
Mexico
|
La Raza – Universidad
|
18.7 (11.62)
|
1970–1983
|
Paris Métro Line 7
|
Paris Métro
|
France
|
La Courneuve – 8 Mai 1945 – Villejuif – Louis Aragon
|
18.6 (11.6)
|
1910–1987
|
Line 3
|
Barcelona Metro
|
Spain
|
Zona Universitària – Trinitat Nova
|
18.4 (11.44)
|
1925-2008
|
Line 1
|
Shanghai Metro
|
China
|
Shanghai South Railway – Shanghai Circus World
|
18.1 (11.25)
|
1993–2004
|
Avtozavodskaya Line
|
Minsk Metro
|
Belarus
|
Kamennaya Gorka – Mogilevskaya
|
18.1 (11.25)
|
1990–2005
|
Line B
|
Prague Metro
|
Czechia
|
Rajská zahrada – Hůrka
|
18.0 (11.2)
|
1998
|
Helsinki Metro
|
Helsinki Metro
|
Finland
|
Kalasatama – Matinkylä
|
17.9 (11.12)
|
1982–2017
|
Line 2 (Athens Metro)[10]
|
Athens Metro
|
Greece
|
Anthoupoli – Elliniko
|
17.9 (11.12)
|
2013
|
Line 5
|
Beijing Subway
|
China
|
Huixin Xijie Beikou – Songjiazhuang
|
17.8 (11.1)
|
2007
|
Line 3 (Athens Metro)[10]
|
Athens Metro
|
Greece
|
Agia Marina – Doukissis Plakentias
|
17.8 (11.06)
|
2013
|
Washington, DC Metro Red Line
|
Washington Metro
|
United States
|
Union Station – Medical Center
|
17.8 (11.05)
|
1984
|
Line 15
|
Beijing Subway
|
China
|
Qinghua Donglu Xikou – Maquanying
|
17.6 (10.9)
|
2014
|
Tozai Line
|
Kyoto Municipal Subway
|
Japan
|
Uzumasa Tenjingawa-Yamashina-Rokujizo
|
17.5 (10.92)
|
2008[page needed]
|
Maskoŭskaja line
|
Minsk Metro
|
Belarus
|
Pyatrowshchyna–Uruchcha
|
17.4 (10.81)
|
1984-2012
|
Line 4
|
Barcelona Metro
|
Spain
|
Trinitat Nova – La Pau
|
17.3 (10.76)
|
1908[clarification needed]-1999
|
Tōzai Line
|
Tokyo Metro
|
Japan
|
Nakano–Minami-Sunamachi
|
17.0 (10.56)
|
1969
|
Tokyo Metro Hanzomon Line
|
Tokyo Metro
|
Japan
|
Shibuya-Oshiage
|
16.8 (10.4)
|
1978-2003
|
Mexico City Metro Line 1
|
Mexico City Metro
|
Mexico
|
Observatorio – Metro Pantitlán
|
16.7 (10.38)
|
1984
|
Blue Line
|
Chennai Metro
|
India
|
Saidapet - Tondiarpet
|
16.6 (10.32)
|
2018-2021
|
Line 9
|
Beijing Subway
|
China
|
National Library – Guogongzhuang
|
16.5 (10.3)
|
2012
|
Line 17
|
Beijing Subway
|
China
|
Shilihe – Jiahuihu
|
16.5 (10.3)
|
2021
|
Metro Madrid L-3
|
Madrid Metro
|
Spain
|
Villaverde Alto – Moncloa
|
16.424 (10.2)
|
2007
|
Line 1
|
Chongqing Rail Transit
|
China
|
Chaotianmen – Shapingba
|
16.4 (10.2)
|
2011
|
Metro Madrid L-4
|
Madrid Metro
|
Spain
|
Argüelles – Pinar de Chamartín
|
16.0 (9.9)
|
2007
|
Sviatoshynsko-Brovarska Line
|
Kyiv Metro
|
Ukraine
|
Akademmistechko–Dnipro
|
16.0 (9.9)
|
2003
|
Seoul Subway Line 7 (shorter section)
|
Seoul Metropolitan Rapid Transit Corporation
|
South Korea
|
Suraksan – Konkuk University
|
16.0 (9.9)
|
1996
|
M3 Line
|
Copenhagen Metro
|
Denmark
|
Circle Route
|
15.5 km (9.6 mi)
|
2019
|
Line 3[11]
|
Budapest Metro
|
Hungary
|
Határ út–Újpest-központ Line is 17.39 km long, but only 15.5 km of it is underground.
|
15.5 km (9.6 mi)
|
1990
|
Line 1
|
Tianjin Metro
|
China
|
Qinjiandao – Tucheng
|
15.37 (9.55)
|
2006
|
Paris Métro Line 12
|
Paris Métro
|
France
|
Front Populaire – Mairie d'Issy
|
15.3 (9.5)
|
1910–2012
|
Syretsko-Pecherska Line
|
Kyiv Metro
|
Ukraine
|
Syrets – Pivdennyi Bridge
|
15.2 (9.4)
|
2004
|
Line 1 (Kolkata Metro)
|
Kolkata Metro
|
India
|
Mahanayak Uttam Kumar -Dum Dum
|
15.17 (9.38)
|
1984-1995
|
Line 10
|
Chengdu Metro
|
China
|
Taipingyuan – Shuangliu West Station
|
15.0 (9.32)
|
2019
|
Island Line
|
MTR
|
Hong Kong
|
Kennedy Town[12] – Heng Fa Chuen
|
15.0 (9.32)
|
1985 (as Hong Kong)-2014
|