1 Train may refer to:
- 1 (New York City Subway service)
- "1 Train" (song), a song by ASAP Rocky
- Green Line (Montreal Metro), also known as Line 1
- Paris Metro Line 1
- Line 1 (Beijing Subway)
- Line 1 (Shanghai Metro)
See also
- One Line (disambiguation)
- Line 1 (disambiguation)
- I Train (disambiguation)
- l Train (disambiguation)