 Dewar Challenge Cup | |
| Tournament details | |
|---|---|
| Country |  USA |
| Defending champions | Fall River F.C. |
| Final positions | |
| Champions | Fall River F.C. (4th title) |
| Runner-up | Chicago Bricklayers |
| Semifinalists | |
The 1931 National Challenge Cup was the annual open cup held by the United States Football Association now known as the Lamar Hunt U.S. Open Cup.