Circle Line or Circular line may refer to:
Railways Asia Azerbaijan Baku suburban railway Baku Metro (partly in operation)
Bangladesh Chittagong Circular Railway
China Line 2 (Beijing Subway) Line 10 (Beijing Subway) Line 4 (Shanghai Metro) Line 7 (Chengdu Metro) Line 5 (Zhengzhou Metro) Loop line (Chongqing Rail Transit) Line 11 (Guangzhou Metro) Line 8 (Xi'an Metro) Line 3 (Harbin Metro) Line 12 (Wuhan Metro) (partly in operation) Guiyang railway loop line
Hong Kong MTR Light Rail Routes 705 and 706, also known as Tin Shui Wai Circular.
India Delhi Ring Railway Kolkata Circular Railway Pink Line (Delhi Metro) (partly in operation)
Indonesia Cikarang Line, in Jakarta
Japan Meijō Line, in Nagoya Osaka Loop Line, in Osaka Sapporo Streetcar, in Sapporo Toei Ōedo Line, in Tokyo Toyama City Tram Line Route 3, in Toyama Yamanote Line, in Tokyo
Malaysia Circle Line (Kuala Lumpur)
Myanmar Yangon Circular Railway
Pakistan Karachi Circular Railway
Singapore Circle Line (Singapore)
South Korea Seoul Subway Line 2
Taiwan Circular light rail, in Kaohsiung Circular line (Taipei metropolitan area)
Thailand MRT Blue Line, in Bangkok
Europe Denmark M3 (Copenhagen Metro), also known as the City Circle Line, a Copenhagen Metro line Ringbanen, a Copenhagen S-train line
Finland Ring Rail Line, in Vantaa (Greater Helsinki)
France Paris Metro Line 15, currently under construction
Germany Berlin Ringbahn U3 (Hamburg U-Bahn)
Italy Line 1 (Naples Metro) (partly in operation)
Norway Ring Line (Oslo)
Poland Łódz Circular line, a section of the Łódź Agglomeration Railway commuter rail service, Łódz, Poland
Portugal Lisbon Metro Green Line (partly in operation)
Russia Bolshaya Koltsevaya line, the Big Circle line of Moscow Metro (Line 11) Koltsevaya line, the Circle line of Moscow Metro (Line 5) Moscow Central Circle, central circle line of Moscow Metro (Line 14)
Spain Line 6 (Madrid Metro) Line 12 (Madrid Metro)
Turkey M11 (Istanbul Metro) (partly in operation)
United Kingdom Circle line (London Underground), in London Cathcart Circle Lines, in Glasgow Fife Circle Line, in Edinburgh and Fife Glasgow Subway, in Glasgow
North America United States Chicago 'L' Circle Line proposed but unbuilt
Oceania Australia City Circle, in Sydney City Circle free tram, in Melbourne City Circle trains were originally a feature of the City Loop in Melbourne Inner Circle railway line, in Melbourne Outer Circle railway line, in Melbourne
Waterways United States Circle Line Downtown, in New York City Circle Line Sightseeing Cruises, in New York City
Others
Circle Line (film), Singaporean film
See also :Category:Railway loop lines Circle route Ring road or beltway, the circumferential motorway. List of ring roads