Line 18
Line 18 may refer to:
China
- Line 18 (Beijing Subway)
- Line 18 (Chengdu Metro)
- Line 18 (Chongqing Rail Transit)
- Line 18 (Guangzhou Metro)
- Line 18 (Shanghai Metro)
Other countries
- Line 18 (São Paulo Metro), a proposed line in Brazil
- Line 18 (Stockholm Metro), in Sweden
- Line 18 (Zürich), or Forch Railway, in Switzerland
- Paris Métro Line 18, an under construction line in France
- Sinsen Line, Line 18 of the Oslo Tramway, in Norway