The Women's 20 km Race Walking event at the 2003 Pan American Games took place on Friday August 6, 2003.
Medalists edit
| Gold | Victoria Palacios Mexico
|
| Silver | Rosario Sánchez Mexico
|
| Bronze | Joanne Dow United States
|
Records edit
| World Record |  Wang Yan (CHN) |
01:26:22 | November 19, 2001 | Guangzhou, PR China
|
| Pan Am Record | Graciela Mendoza (MEX) |
01:34:19 | July 26, 1999 |  Winnipeg, Canada
|
Results edit
| Rank | Athlete | Time |
|---|---|---|
| 1 |  Victoria Palacios (MEX) |
01:35:16 |
| 2 | Rosario Sánchez (MEX) |
01:35:21 |
| 3 |  Joanne Dow (USA) |
01:35:48 |
| 4 |  Geovana Irusta (BOL) |
01:37:08 |
| 5 | Ariana Quino (BOL) |
01:38:43 |
| 6 |  Sandra Zapata (COL) |
01:38:49 |
| 7 |  Teresita Collado (GUA) |
01:39:18 |
| 8 | Amber Antonia (USA) |
01:42:45 |
| 9 |  Cristina Rodríguez (DOM) |
01:51:47 |
| 10 | Francisca Lora (DOM) |
01:52:30 |