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

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

World record	Yuliya Pechonkina (RUS)	52.34	Tula, Russia	August 8, 2003
Pan American Games record	Daimí Pernía (CUB)	53.44	Winnipeg, Canada	July 28, 1999

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the minimum standard (59.56) in the qualifying period (January 1, 2014 to June 28, 2015).^[2]

All times shown are in seconds.

Semifinals

Rank	Heat	Name	Nationality	Time	Notes
1	2	Shamier Little	United States	56.08	Q
2	1	Sparkle McKnight	Trinidad and Tobago	56.56	Q, SB
3	2	Sarah Wells	Canada	56.77	Q
4	2	Zurian Hechavarria	Cuba	56.82	Q, SB
5	2	Déborah Rodríguez	Uruguay	56.86	q
6	2	Jessica Gelibert	Haiti	57.58	q, SB
7	1	Zudikey Rodríguez	Mexico	57.64	Q, SB
8	1	Sharolyn Scott	Costa Rica	57.76	Q, SB
9	2	Samantha Elliott	Jamaica	58.30
10	1	Sage Watson	Canada	58.36
11	1	Ristananna Tracey	Jamaica	58.62
12	1	Jailma de Lima	Brazil	58.72
13	1	Magdalena Mendoza	Venezuela	58.95
14	2	Josanne Lucas	Trinidad and Tobago	1:00.30
15	2	Jenea McCammon	Guyana	1:03.21
	1	Kori Carter	United States	DNS

Final

Rank	Lane	Name	Nationality	Time	Notes
	4	Shamier Little	United States	55.50
	3	Sarah Wells	Canada	56.17
	2	Déborah Rodríguez	Uruguay	56.41
4	8	Zurian Hechavarria	Cuba	56.72	SB
5	5	Sparkle McKnight	Trinidad and Tobago	57.30
6	6	Zudikey Rodríguez	Mexico	57.65
7	7	Sharolyn Scott	Costa Rica	58.65
8	1	Jessica Gelibert	Haiti	1:00.23