| National Challenge Cup | |
| Year: | 1918-19 |
| Dates: | November 10, 1918- April 19, 1919 |
| Defending Champions: | Bethlehem Steel |
| Winners: | Bethlehem Steel |
| Count: | 4 |
| Second: | Paterson F.C. |
| Semifinal1: | Morse Dry Dock |
| Semifinal2: | Bricklayers and Masons |
| Matches: | 2-0 |
| Prev Season: | 1918 |
| Next Season: | 1920 |
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.
Home teams listed on top of bracket
(*) replay after tied match
w/o walkover/forfeit victory awarded