Athletics at the 2015 Pan American Games – Women's 400 metres

The women's 400 metres sprint competition of the athletics events at the 2015 Pan American Games took place between July 22nd and 23rd at the CIBC Pan Am and Parapan Am Athletics Stadium. The defending Pan American Games champion is Jennifer Padilla of Colombia.

Records
Prior to this competition, the existing world and Pan American Games records were as follows:

Qualification
Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the minimum standard (52.94) in the qualifying period (January 1, 2014 to June 28, 2015).

Results
All times shown are in seconds.