Circle Line

Circle Line can mean:

 The Circle line, in London
 The Linea 6 (Line 6) of Madrid Metro,which is a circular line in the centre of Madrid.
 The Circle MRT Line, in Singapore
 The Koltsevaya Line, in Moscow
 The Yamanote Line, in Tokyo
 The Osaka Loop Line, in Osaka
 Circle Line Sightseeing Cruises and Circle Line Downtown, sightseeing ferry companies in Manhattan, New York
 Line 2, Beijing Subway
 Shanghai Metro Line 4, in Shanghai
 Seoul Subway Line 2, in Seoul
 The Koltsevaya Line (Saint Petersburg) in Saint Petersburg (under construction)
 The Circle Line, a proposed rapid transit line in Chicago
 The Fife Circle Line, in Scotland
 Copenhagen Metro Line M3, is a future metro circle line, also called the City Circle Line
 The Ringbahn Berlin (Circle Line)