1903 U.S. National Championships – Women's singles
# 1903 U.S. National Championships – Women's singles

Elisabeth Moore won the singles tennis title of the 1903 U.S. Women's National Singles Championship by defeating reigning champion Marion Jones 7–5, 8–6 in the challenge round. Moore had won the right to challenge Jones by defeating Carrie Neely 6–2, 6–4 in the final of the All Comers' competition. The event was played on outdoor grass courts and held at the Philadelphia Cricket Club in Wissahickon Heights, Chestnut Hill, Philadelphia, from June 24 through June 27, 1903.

## Draw

### Challenge round

| Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round |
| - | - | - | - | - |
| Marion Jones | Marion Jones | 5 | 6 | |
| Elisabeth Moore | Elisabeth Moore | 7 | 8 | |

### All Comers' finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals |
| - | - | - | - | - | - | - | - | - | - | - | - |
| Marjorie Oberteuffer | Marjorie Oberteuffer | 6 | 6 | | | | | | | | |
| Gertrude Fetterman | Gertrude Fetterman | 2 | 3 | | | | | | | | |
| Gertrude Fetterman | Gertrude Fetterman | 2 | 3 | Marjorie Oberteuffer | Marjorie Oberteuffer | 0 | 0 | | | | |
| | | | | Elisabeth Moore | Elisabeth Moore | 6 | 6 | | | | |
| Elisabeth Moore | Elisabeth Moore | 6 | 6 | Elisabeth Moore | Elisabeth Moore | 6 | 6 | | | | |
| Miriam Hall | Miriam Hall | 2 | 0 | | | | | | | | |
| Miriam Hall | Miriam Hall | 2 | 0 | | | | | Elisabeth Moore | Elisabeth Moore | 6 | 6 |
| | | | | | | | | Carrie Neely | Carrie Neely | 2 | 4 |
| Carrie Neely | Carrie Neely | 6 | 6 | | | | | | | | | Carrie Neely | Carrie Neely | 2 | 4 |
| Clara Chase | Clara Chase | 0 | 1 | | | | | | | | |
| Clara Chase | Clara Chase | 0 | 1 | Carrie Neely | Carrie Neely | 6 | 6 | | | | |
| | | | | Helen Chapman | Helen Chapman | 0 | 1 | | | | |
| Helen Chapman | Helen Chapman | 6 | 8 | Helen Chapman | Helen Chapman | 0 | 1 | | | | |
| Corrine Mock | Corrine Mock | 1 | 6 | | | | | | | | |
