Crosstown Line may refer to the following transit lines:
New York City
edit- IND Crosstown Line in New York (rapid transit)
- Crosstown Line (Brooklyn surface) (bus, formerly streetcar)
- 39th Street Crosstown Line on Church Avenue in Brooklyn (bus, formerly streetcar)
Toronto
edit- Line 5 Eglinton, an under-construction rapid transit line in Toronto, Ontario, Canada, also known as the Crosstown Line
Washington D.C.
edit- Crosstown Line (Washington, D.C.) (bus line)