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

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

World record	Marita Koch (GDR)	47.60	Canberra, Australia	6 October 1985
Pan American Games record	Ana Fidelia Quirot (CUB)	49.61	Havana, Cuba	August 5, 1991

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).^[2]

All times shown are in seconds.

Rank	Heat	Name	Nationality	Time	Notes
1	2	Kendall Baisden	United States	51.81	Q
2	2	Kineke Alexander	Saint Vincent and the Grenadines	52.24	Q
3	1	Shakima Wimbley	United States	52.28	Q
4	1	Geisa Coutinho	Brazil	52.46	Q
5	2	Chrisann Gordon	Jamaica	52.47	Q
6	1	Daisurami Bonne	Cuba	52.90	Q, SB
7	1	Anastasia Le-Roy	Jamaica	53.13	q
8	2	Lisneidy Veitia	Cuba	53.59	q
9	2	Taylor Sharpe	Canada	53.82
10	2	Nercely Soto	Venezuela	54.24	SB
11	1	Audrey Jean-Baptiste	Canada	54.27
12	1	Lanece Clarke	Bahamas	54.33
13	1	Janeil Bellille	Trinidad and Tobago	54.41
	2	Joelma Sousa	Brazil	DNF
	1	Marlena Wesh	Haiti	DNF

Rank	Name	Nationality	Time	Notes
	Kendall Baisden	United States	51.27
	Shakima Wimbley	United States	51.36
	Kineke Alexander	Saint Vincent and the Grenadines	51.50
4	Chrisann Gordon	Jamaica	51.75
5	Anastasia Le-Roy	Jamaica	52.05
6	Geisa Coutinho	Brazil	52.05
7	Daisurami Bonne	Cuba	52.28	SB
8	Lisneidy Veitia	Cuba	52.44	SB