Athletics at the 1971 Pan American Games
Track events
100 m	men	women
200 m	men	women
400 m	men	women
800 m	men	women
1500 m	men
5000 m	men
10,000 m	men
100 m hurdles		women
110 m hurdles	men
400 m hurdles	men
3000 m steeplechase	men
4×100 m relay	men	women
4×400 m relay	men	women
Road events
Marathon	men
20 km walk	men
50 km walk	men
Field events
High jump	men	women
Pole vault	men
Long jump	men	women
Triple jump	men
Shot put	men	women
Discus throw	men	women
Hammer throw	men
Javelin throw	men	women
Combined events
Pentathlon		women
Decathlon	men
v t e

The women's 400 metres event at the 1971 Pan American Games was held in Cali on 2 and 3 August.^[1][2] It was the first time that this distance was contested by women at the Games.

Gold	Silver	Bronze
Marilyn Neufville  Jamaica	Carmen Trustée  Cuba	Yvonne Saunders  Jamaica

Rank	Heat	Name	Nationality	Time	Notes
1	1	Aurelia Pentón	Cuba	53.76	Q
2	1	Marilyn Neufville	Jamaica	53.88	Q
3	3	Yvonne Saunders	Jamaica	53.91	Q
4	3	Brenda Walsh	Canada	54.33	Q
5	2	Carmen Trustée	Cuba	55.09	Q
6	3	Jarvis Scott	United States	55.26	q
7	2	Gwen Norman	United States	55.94	Q
8	1	Joyce Sadowick	Canada	56.01	q
9	2	Josefa Vicent	Uruguay	56.13
10	2	Elsy Rivas	Colombia	56.74
11	3	Rosalia Abadía	Panama	57.05
12	1	Gloria González	Chile	57.12
13	1	Cristina Filgueira	Argentina	57.19
14	3	María Cristina Ducci	Chile	57.47
15	1	Ana Cecilia Maquillón	Colombia	58.67
16	3	Lorraine Jordan	Guyana	1:00.75
17	2	Russel Carrero	Nicaragua	1:01.28

Rank	Name	Nationality	Time	Notes
	Marilyn Neufville	Jamaica	52.34
	Carmen Trustée	Cuba	52.89
	Yvonne Saunders	Jamaica	53.13
4	Aurelia Pentón	Cuba	53.62
5	Brenda Walsh	Canada	54.61
6	Joyce Sadowick	Canada	54.88
7	Gwen Norman	United States	55.46
8	Jarvis Scott	United States	56.33