The 1918–19 National Challenge Cup was the sixth National Challenge cup held by the United States Football Association. Bethlehem Steel won their fourth title in a 2–0 victory over Paterson F.C.

Bethlehem Steel Football Club (1907–1930) was one of the most successful early American soccer clubs. Known as the Bethlehem Football Club from 1907 until 1915 when it became the Bethlehem Steel Football Club, the team was sponsored by the Bethlehem Steel corporation. Bethlehem Steel FC played their home games first at East End Field in Bethlehem, Pennsylvania, in the Lehigh Valley, then later on the grounds Bethlehem Steel built on Elizabeth Ave named Bethlehem Steel Athletic Field.