Broadway Line refers to the following transit lines:

;In Brooklyn

  • Broadway Line (Brooklyn elevated) (rapid transit, now the BMT Jamaica Line); served by the trains
  • Broadway Line (Brooklyn surface) (bus, formerly streetcar)

;In Manhattan

  • BMT Broadway Line (rapid transit); served by the trains
  • IRT Broadway–Seventh Avenue Line (rapid transit); served by the trains
  • Broadway Line (Lower Manhattan surface), Broadway and Amsterdam Avenue Line, Broadway and Columbus Avenue Line, and Broadway and Lexington Avenue Line (bus, formerly streetcar) on Broadway below Times Square
  • Broadway and University Place Line, an older streetcar line using Broadway between Union Square and Times Square
  • Broadway Line (Midtown Manhattan surface) (bus, formerly streetcar) on Broadway from 42nd Street to 125th Street
  • Broadway-Kingsbridge Line (bus, formerly streetcar) on Broadway from near 169th Street to the Bronx
  • Broadway and 145th Street Line (bus, formerly streetcar) on Broadway from near 169th Street to the city line

;Elsewhere

  • Broadway Line (Queens surface) (bus, formerly streetcar)
  • Broadway Bus (Bayonne), New Jersey
  • Broadway Line (Baltimore) (bus, formerly streetcar)