Line 6
- 6 (BMT rapid transit service)
- 6 (Los Angeles Railway)
- 6 (New York City Subway service)
- 6 Train (disambiguation)
- Barcelona Metro line 6
- Berlin U-Bahn
- Circular line (Taipei metropolitan area)
- Frankfurt U-Bahn
- KLIA Ekspres
- Line 6 (Beijing Subway)
- Line 6 (Changsha Metro)
- Line 6 (Chengdu Metro)
- Line 6 (Chongqing Rail Transit)
- Line 6 (Fuzhou Metro)
- Line 6 (Guangzhou Metro)
- Line 6 (Hangzhou Metro)
- Line 6 (Kunming Metro)
- Line 6 (Madrid Metro)
- Line 6 (Montreal Metro)
- Line 6 (Moscow Metro)
- Line 6 (Mumbai Metro)
- Line 6 (Naples Metro)
- Line 6 (Osaka)
- Line 6 (Saint Petersburg Metro)
- Line 6 (Shanghai Metro)
- Line 6 (Shenzhen Metro)
- Line 6 (Suzhou Metro)
- Line 6 (São Paulo Metro)
- Line 6 (Tianjin Metro)
- Line 6 (Wuhan Metro)
- Line 6 (Xi'an Metro)
- Line 6 (Zhengzhou Metro)
- Line 6 (company)
- Line 6 Finch West
- List of highways numbered 6
- List of public transport routes numbered 6
- MRT Line 6 (Dhaka Metro)
- Manila Light Rail Transit System Line 6
- Metrorrey Line 6
- Mexico City Metro Line 6
- Mexico City Metrobús Line 6
- No. 6 Line (Baltimore streetcar)
- Orange Line (Kolkata Metro)
- Paris Métro Line 6
- Santiago Metro Line 6
- Seoul Subway Line 6
- T6 Carlingford Line
- U6 (Berlin U-Bahn)
- U6 (Frankfurt U-Bahn)
- Île-de-France tramway Line 6