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Top 5 longest tunnels in the world

evergreen

The 5 longest tunnels in the world by tunnel length (all types): Delaware Aqueduct (United States), Paijanne Water Tunnel (Finland), and more.

Snapshot · 2026-09-01

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  1. 1

    Delaware Aqueduct (United States)

    137 km

  2. 2

    Paijanne Water Tunnel (Finland)

    120 km

  3. 3

    Suzhou Metro Line 3-11 (China)

    86.542 km

  4. 4

    Dahuofang Water Tunnel (China)

    85.32 km

  5. 5

    Orange-Fish River Tunnel (South Africa)

    82.8 km