Name
System
Country
Stations
Length in km (mi)
Year of completion
Lines 3 -11
Suzhou Metro
China
Line 3 and Line 11 are connected at Weiting Station with through trains passing by.
86.54 km (53.77 mi)
2019–2023
Line 6
Chengdu Metro
China
Wangcong Temple – Lanjiagou
68.2 (42.4)[ 1]
2020
Line 19
Chengdu Metro
China
Huangshi to Tianfu
67 km (42 mi)
2020–2023
Line 1
Qingdao Metro
China
Dongguozhuang to Wangjiagang
59.82 km (37.17 mi)
2020–2021
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
Bolshaya Koltsevaya line
Moscow Metro
Russia
Circle route
57.54 km (35.75 mi)[ 3] [ 4] (excluding Moscow-City branch)
2018–2023[ 5]
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 (longest branch)
Seoul Subway
South Korea
Banghwa –Hanam Geomdansan
51.7 km (32.1 mi)
1995–2021
M11
Istanbul Metro
Turkey
Gayrettepe – Arnavutköy Hastane
51.5 (32)
2023–2024
Line 2
Wuhan Metro
China
Julong Boulevard - Fozuling
50.347 (27.556)
2012–2019
Arbatsko-Pokrovskaya line
Moscow Metro
Russia
Pyatnitskoye Shosse – Shchyolkovskaya
45.1 (28.0)
1938–2012
Sokolnicheskaya line
Moscow Metro
Russia
Kommunarka – Bulvar Rokossovskogo
44.5 (27.7)
1935–2019
Lyublinsko-Dmitrovskaya line
Moscow Metro
Russia
Zyablikovo – Fiztekh
44.3 (27.5)
1995–2023
Zamoskvoretskaya line
Moscow Metro
Russia
Khovrino – Alma-Atinskaya
42.8 (26.6)
1938–2018
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
Tagansko-Krasnopresnenskaya line
Moscow Metro
Russia
Planernaya – Kotelniki
42.2 (26.2)
1966–2015
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)[ 6]
2013–2017
Line 3
Nanjing Metro
China
Xinghuolu – Mozhoudonglu
41.5 (25.8)
2015
Line 4
Suzhou Metro
China
Longdaobang — Tongli
41.5 (25.8)
2017
Serpukhovsko-Timiryazevskaya line
Moscow Metro
Russia
Altufyevo – Bulvar Dmitriya Donskogo
41.2 (25.6)
1983–2002
L-12 (Metro Sur)
Madrid Metro
Spain
Circle route
40.96 (25.5)
2003
Toei Oedo Line [citation needed ]
Toei Subway
Japan
Hikarigaoka – Shiodome – Tocho-mae
40.7 (25.3)
2000
Seoul Subway Line 9
Seoul Subway
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
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 Subway
South Korea
Eungam Loop – Bonghwasan
35.1 (21.8)
2001
Seoul Subway Line 7 (longest branch)
Seoul Subway
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
Line 8
Guangzhou Metro
China
Wanshengwei —Jiaoxin
33.9 (21.1)
2010–2020
M4
Istanbul Metro
Turkey
Kadıköy – Sabiha Gökçen Havalimanı
33.5 (20.8)
2012–2022
Circle MRT line
Mass Rapid Transit (Singapore)
Singapore
Dhoby Ghaut – HarbourFront
33.3 (20.69)[ 7]
2009–2012
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)[ 8]
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
Solntsevskaya line
Moscow Metro
Russia
Aeroport Vnukovo – Delovoy Tsentr
30.9 (19.2)
2014–2023
IND Eighth Avenue Line and IND Fulton Street Line [ 9]
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
Thomson–East Coast line
Mass Rapid Transit (Singapore)
Singapore
Woodlands North – Gardens by the Bay
30.4 km (18.9 mi)
2020–2022
Line 2
Shanghai Metro
China
East Xujing – Longyang Road
30.2 (18.77)
2010
Moskovsko-Petrogradskaya Line
Saint Petersburg Metro
Russia
Parnas –Kupchino
30.1 (18.7)
1961–2006
Line 8
Shanghai Metro
China
Shiguang Road – Luheng Road
29.7 (18.45)
2009
Kirovsko-Vyborgskaya Line
Saint Petersburg Metro
Russia
Devyatkino – Prospekt Veteranov
29.57 (18.4)
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
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
Nevsko-Vasileostrovskaya Line
Saint Petersburg Metro
Russia
Begovaya –Rybatskoye
27.7 (17.2)
1967–2018
Tanimachi Line
Osaka Metro
Japan
Dainichi –Nagahara
27.1 (16.7)
1967–1983
M5
Istanbul Metro
Turkey
Üsküdar – Samandıra Merkez
26.5 (12.5)
2017–2024
Meijo Line [citation needed ]
Nagoya Municipal Subway
Japan
Kanayama –Nagoya Dome-mae Yada -Kanayama
26.4 (16.4)
1965–2004
B Line
Los Angeles Metro Rail
United States
North Hollywood - Union Station
26.4 (16.4)
1993–2000
Frunzensko-Primorskaya Line
Saint Petersburg Metro
Russia
Komendantsky Prospekt – Shushary
26.2 (16.3)
1997–2019
Line 1
Suzhou Metro
China
Mudu – Zhongnan Jie
25.7 (16.0)
2012
Line 3 [ 10]
Athens Metro
Greece
Dimotiko Theatro – Doukissis Plakentias
25.3 (15.72)
2023
Helsinki Metro
Helsinki Metro
Finland
Kalasatama – Kivenlahti
25.2 (15.7)
1982–2022
Orange Line
Taipei Metro
Taiwan
Huilong –Nanshijiao
25.1 (15.6) (longest branch)
1998–2013
Line 3
Santiago Metro
Chile
Plaza de Quilicura - Fernando Castillo Velasco
25 (13.5)
2019–2023
Yurakucho Line
Tokyo Metro
Japan
Chikatetsu Narimasu – Tatsumi
24.6 (15.3)
1974–1988
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)[ 11] [ 12]
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
M3
Istanbul Metro
Turkey
Bakırköy Sahil – Şehir Hastanesi Viaduct
22.6 (16.6)
2013–2024
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
Obolonsko–Teremkivska line
Kyiv Metro
Ukraine
Heroiv Dnipra –Teremky
20.95 (13.02)
1976–2013
Line 6
Shanghai Metro
China
Boxing Road – Oriental Sports Center
20.34 (12.64)
2007–2011
Line 1
Barcelona Metro
Spain
Fondo – Hospital de Bellvitge
20.2 (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
M1
Ankara Metro
Turkey
Koru – Atatürk Kültür Merkezi
20.1 (12.4)
1997–2014
L-5
Madrid Metro
Spain
Alameda de Osuna – Empalme
20.005 (12.5)
1968–2006
Line 9
Barcelona Metro
Spain
Zona Universitaria – Aeroport T1
20.0 (12.5)
2004–2016
North East MRT line
Mass Rapid Transit (Singapore)
Singapore
HarbourFront –Punggol
20.0 (12.43)[ 13]
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
Nekrasovskaya line
Moscow Metro
Russia
Nizhegorodskaya – Nekrasovka
19.6 (12.2)
2019–2020
Paris Métro Line 9
Paris Métro
France
Pont de Sèvres – Mairie de Montreuil
19.6 (12.18)
1922–1937
M2
Istanbul Metro
Turkey
Şişhane – Hacıosman Line is 23,49 km long, but the longest continuous underground section is 19.54 km long.
19.54 (12.14)
2000–2014
Red , Yellow , Blue , and Green Lines
Bay Area Rapid Transit , San Francisco
United States
Balboa Park – West Oakland
19.5 (12.12)
1973
Metro Northwest
Sydney Metro
Australia
Cherrybrook –Chatswood
19.5 km (12.1 mi)
2009–2019
Kol'tsevaya Line
Moscow Metro
Russia
Circle route
19.4 (12.2)
1950–1954
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
Maskoŭskaja line
Minsk Metro
Belarus
Malinawka –Uruchcha
19.1 (11.9)
1984–2014
Midosuji Line
Osaka Metro
Japan
Nakatsu – Nakamozu
19.1 (11.87)
1933–1987
Line 5
Barcelona Metro
Spain
Vall d'Hebron – Cornella centre
19.0 (11.8)
1955–2010
Warsaw Metro M2
Warsaw Metro
Poland
Bemowo –Bródno
18.9 km (11.7 mi)
2015–2022
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
18.3 (11.6)
1910–1987
Red Line
Baku Metro
Azerbaijan
Icheri Sheher – Hazi Aslanov
18.6 (11.6)
1967–2002
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
U8
Berlin U-Bahn
Germany
Wittenau – Hermannstraße
18.1 (11.25)
1927–1996
Line B
Prague Metro
Czechia
Rajská zahrada – Hůrka
18.0 (11.2)
1998
Line 2 [ 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
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 ]
Line 4
Barcelona Metro
Spain
Trinitat Nova – La Pau
17.3 (10.76)
1908[clarification needed ] –1999
Kholodnohirsko–Zavodska line
Kharkiv Metro
Ukraine
Kholodna Hora – Industrialna
17.3 (10.7)
1975–1978
Milan Metro M3
Milan Metro
Italy
Comasina – San Donato
17.105 (10.62)
1990–2011
Bucharest Metro Line M2
Bucharest Metro
Romania
Pipera – Berceni
17.1 (10.62)
1986–1987
Tōzai Line
Tokyo Metro
Japan
Nakano –Minami-Sunamachi
17.0 (10.56)
1969
M1
İzmir Metro
Turkey
Kaymakamlık – Basmane Line is 27 km long, but only 19.8 km of it is underground in two noncontinuous sections. The shorter underground section is 2.9 km long.
16.9 (10.5)
2000–2024
Hanzomon Line
Tokyo Metro
Japan
Shibuya -Oshiage
16.8 (10.4)
1978–2003
Mexico City Metro Line 1
Mexico City Metro
Mexico
Observatorio – 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
L-3
Madrid Metro
Spain
Villaverde Alto – Moncloa
16.42 (10.2)
2007
Line 1
Chongqing Rail Transit
China
Chaotianmen – Shapingba
16.4 (10.2)
2011
Line A
Prague Metro
Czechia
Nemocnice Motol – Depo Hostivař Line is 17.1 km long, but only 16.4 km of it is underground.
16.4 (10.2)
2015
Kalininskaya line
Moscow Metro
Russia
Tretyakovskaya – Novokosino
16.3 (10.1)
1979–2012
Metro City
Sydney Metro
Australia
Chatswood – Sydenham
16 km (9.9 mi)
2024[ 14]
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)
1960–2003
Seoul Subway Line 7 (shorter section)
Seoul Subway
South Korea
Suraksan – Konkuk University
16.0 (9.9)
1996
U6
Berlin U-Bahn
Germany
Alt-Mariendorf – Kurt-Schumacher-Platz
15.9 (9.86)
1923–1966
M9
Istanbul Metro
Turkey
Ataköy – Olimpiyat Viaduct
15.8 (10.7)
2013–2024
M3 Line
Copenhagen Metro
Denmark
Circle route
15.5 km (9.6 mi)
2019
Line 3 [ 15]
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
Line 6
Santiago Metro
Chile
Cerrillos – Los Leones
15.3 (9.5)
2017
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)
1989–2004
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 [ 16] – Heng Fa Chuen
15.0 (9.32)
1985 (as Hong Kong ) –2014