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  • Contains 278 records / 7 fields
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  • Data sourced from: https://github.com/sharmadhiraj/free-json-datasets

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Showing 20 of 278

⚠️ Showing first 20 of 278 records. Download the file for complete data.

Rank Tunnel Type Tunnel Name Location Length Km Year Opened Notes
1Water supplyDelaware AqueductNew York State, United States137,000 m (85.128 mi)19454.1 m in diameter (13.2 m2). New York City's main water supply tunnel.
2Water supplyPäijänne Water TunnelSouthern Finland, Finland120,000 m (74.565 mi)198216 m2 cross section. Main water supply tunnel for the Helsinki metropolitan area in southern Finland, drilled through solid rock.
3MetroSuzhou Metro Line 3-11Suzhou, China86,542 m (53.775 mi)2019–2023Suzhou Metro Line 11 and Line 3 are connected at Weiting station with through trains operating. Longest metro tunnel
4Water supplyDahuofang Water TunnelLiaoning, China85,320 m (53.015 mi)20098 m in diameter (50 m2 cross section)
5Water supplyOrange–Fish River TunnelSouth Africa82,800 m (51.450 mi)1972Longest continuous enclosed aqueduct in the Southern Hemisphere (22.5 m2 cross section). Built to divert water from the Orange River to the Great Fish River.
6Water supplyBolmen Water TunnelKronoberg/Scania, Sweden82,000 m (50.952 mi)19878 m2 cross section
7MetroIstanbul Metro (Line M11)Istanbul, Turkey69,000 m (42.875 mi)2023–2025Longest metro tunnel in Europe and longest tunnel in Turkey
8MetroChengdu Metro Line 6Chengdu, China68,223 m (42.392 mi)2020
9Hydro­electricNeelum–Jhelum Hydropower TunnelMuzaffar­abad, Azad Kashmir, Pakistan68,000 m (42.253 mi)2017Part of the 969 MW Neelum–Jhelum Hydropower Plant
10Waste­waterTunel Emisor OrienteMexico City, Mexico62,500 m (38.836 mi)20197 m in diameter. Longest wastewater tunnel.
11MetroQingdao Metro Line 1Qingdao, China59,818 m (37.169 mi)2020–2021
12MetroGuangzhou Metro Line 18Guangzhou, China58,300 m (36.226 mi)2021
13MetroGuangzhou Metro Line 3Guangzhou, China57,930 m (35.996 mi)(Excl. branch)2005–2018
14MetroMoscow Metro Bolshaya Koltsevaya lineMoscow, Russia57,538 m (35.752 mi)(Excl. branch)2018–2023Longest metro/rapid transit circular line
15Railway Twin TubeGotthard Base TunnelCentral Swiss Alps, Switzerland57,104 m (35.483 mi) and 57,017 m (35.429 mi)2016Longest conventional railway tunnel. It is also the world's longest transit tunnel by geodetic distance; 55.782 km (34.661 mi) between the two portals. Total 151.84 km (94.35 mi) of broken out tunnels…
16MetroBeijing Subway Line 10Beijing, China57,100 m (35.480 mi)2008–2013
17Railway Single TubeSeikan TunnelTsugaru Strait, Japan53,850 m (33.461 mi)198874 m2; longest railway tunnel until 2016. Longest tunnel with an undersea section, running between Honshu and Hokkaido. Undersea section measures 23.3 kilometres (14.5 mi).
18MetroBeijing Subway Line 6Beijing, China53,400 m (33.181 mi)2012–2018
19Water supplyŽelivka Water TunnelCentral Bohemian Region, Czech Republic51,970 m (32.293 mi)19729–12 m2
20MetroSeoul Subway: Line 5Seoul, South Korea51,700 m (32.125 mi)(longest branch)1995–2021Longest metro/rapid transit tunnel until Guangzhou Metro Line 3 extension opened in 2010, crosses west to east under the Seoul Capital Area.
Source: https://github.com/sharmadhiraj/free-json-datasets Last updated: 2026-04