| National Challenge Cup | |
| Year: | 1947 |
| Country: |  United States |
| Dates: | 4 May-7 Sep 1947 |
| Defending Champions: | Viking A.A. |
| Winners: | Ponta Delgada S.C. |
| Count: | 1 |
| Second: | Chicago Sparta |
| Semifinal1: | Brooklyn Hispano |
| Semifinal2: | Curry S.C. |
| Prev Season: | 1946 |
| Next Season: | 1948 |
The 1947 National Challenge Cup was the 33rd edition of the United States Soccer Football Association's annual open cup. Today, the tournament is known as the Lamar Hunt U.S. Open Cup. Teams from the American Soccer League II competed in the tournament, based on qualification methods in their base region. Ponta Delgada S.C. won the tournament for their first time ever, by defeating Chicago Sparta.