Brown Line

Brown Line may refer to:

• Brown line, a process defined as siderotype, a monochrome printing process
• Brown Line (CTA), Chicago
• Brown Line (Delhi Metro), Delhi, India
• Brown Line (Mexico City Metro), Mexico
• Brown Line (Pittsburgh), Pittsburgh, Pennsylvania
• Bakerloo line, London, United Kingdom
• BMT Nassau Street Line, a rapid transit line in New York City
  • J/Z (New York City Subway service)
• Tangerang Line of KRL Commuterline, Jakarta, Indonesia
• Paris Métro Line 11, Paris, France
• Thomson–East Coast MRT line, Singapore
• Ma On Shan line, Hong Kong, China
• Tuen Ma line, Hong Kong, China
• U5 (Berlin U-Bahn), Berlin, Germany
• Wenhu line, Taipei, Taiwan
• Copper Line (San Diego Trolley), San Diego, California