Results for Guyana in 400 metres, Women

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1984 Summer Olympics	June Griffith	5 h1 r2/3
1988 Summer Olympics	Marilyn Dewarder	5 h4 r1/4
2000 Summer Olympics	Aliann Pompey	8 h1 r2/4
2004 Summer Olympics	Aliann Pompey	5 h3 r2/3
2008 Summer Olympics	Aliann Pompey	3 h1 r2/3
2012 Summer Olympics	Aliann Pompey	8 h2 r2/3
2016 Summer Olympics	Aliyah Abrams	5 h8 r1/3
2020 Summer Olympics	Aliyah Abrams	7 h2 r2/3
2024 Summer Olympics	Aliyah Abrams	5h1 r2/4