Swimming at the 1975 Pan American Games – Women's 400 metre freestyle
The women's 400 metre freestyle competition of the swimming events at the 1975 Pan American Games took place on 22 October. The last Pan American Games champion was Ann Simmons of the United States.
This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke.Results
All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |
Heats
Final
The final was held on October 22.
| Rank | Name | Nationality | Time | Notes |
| Kathy Heddy | | 4:23.00 | GR |
| Kathie Wickstrand | | 4:27.66 | |
| Michele Oliver | | 4:30.20 | |
| 4 | - | - | - | |
| 5 | Maria Guimarães | | 4:39.00 | |
| 6 | - | - | - | |
| 7 | - | - | - | |
| 8 | Leila Louzada | | 4:51.85 | |
