Line 8 or 8 Line may refer to:
Asia China Line 8 (Beijing Subway) Line 8 (Changchun Rail Transit) Line 8 (Chengdu Metro) Line 8 (Guangzhou Metro) Line 8 (Hangzhou Metro) Line 8 (Hefei Metro) Line 8 (Jinan Metro) Line 8 (Ningbo Rail Transit) Line 8 (Qingdao Metro) Line 8 (Shanghai Metro) Line 8 (Shenzhen Metro) Line 8 (Suzhou Metro) Line 8 (Tianjin Metro) (currently known as Phase 2 of Line 6) Line 8 (Wuhan Metro) Line 8 (Xi'an Metro)
India Line 8 (Delhi Metro), or Magenta Line Line 8 (Mumbai Metro)
Japan Line 8 (Osaka), or Imazatosuji Line
Malaysia KL Monorail, numbered 8
Philippines MRT Line 8, Metro Manila
South Korea Seoul Subway Line 8
Thailand Bus Line 8 (Bangkok)
Australia T8 Airport & South Line, Sydney Trains service
Europe France Paris Metro Line 8
Russia Line 8 (Moscow Metro) and 8A, or Kalininsko–Solntsevskaya line
Spain Barcelona Metro line 8 Line 8 (Madrid Metro)
Switzerland S8 (ZVV), Zurich
North America Cuba Line 8 (Havana Suburban Railway)
Mexico Mexico City Metro Line 8
Panama Line 8 (Panama Metro) (planned)
United States 8 (Los Angeles Railway) (defunct) 8 (New York City Subway service) (defunct) Route 8 (Baltimore), a bus route, now subsumed by CityLink Red
South America Brazil Line 8 (CPTM), São Paulo
Chile Santiago Metro Line 8, a line that is in planning
See also List of public transport routes numbered 8