Athletics at the 2019 African Games – Women's 400 metres

Qualification: First 3 in each heat (Q) and the next 4 fastest (q) advanced to the semifinals.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Favour Ofili	Nigeria	52.20	Q
2	3	Mary Moraa	Kenya	52.31	Q
3	1	Grace Obour	Ghana	52.53	Q
4	2	Galefele Moroko	Botswana	52.70	Q
5	3	Leni Shida	Uganda	53.31	Q
6	4	Beatrice Masilingi	Namibia	53.33	Q
7	3	Assia Raziki	Morocco	53.43	Q
8	1	Tjipekapora Herunga	Namibia	53.45	Q
9	4	Patience Okon George	Nigeria	53.55	Q
10	3	Eman Elbashl	Egypt	53.68	q
11	4	Linda Kageha	Kenya	54.12	Q
12	1	Marcelle Bouele Bondo	Republic of the Congo	54.20	q
13	1	Nasiba Nabirye	Uganda	54.30	q
14	4	Maggie Barrie	Sierra Leone	54.39	q
15	1	Souliath Saka	Benin	54.70
16	2	Stella Wonruku	Uganda	54.99	Q
17	2	Amarachukwu Jecinta Obi	Nigeria	55.24	Q
18	2	Linda Angounou Ngouayaka	Cameroon	55.62
19	2	Worknesh Mesele	Ethiopia	55.79
20	3	Mariama Mamoudou Ittatou	Niger	55.86
21	1	Fatou Gaye	Senegal	56.30
22	3	Tsige Duguma	Ethiopia	56.37
23	1	Kadia Dembele	Mali	56.59
24	4	Danel Holton	South Africa	56.91
25	4	Tlhomphang Basele	Botswana	57.00
26	4	Msgana Haylu	Ethiopia	57.29
27	2	Mary Thomas Tarawally	Sierra Leone	57.43
28	2	Hellen Syombua	Kenya	58.83
29	3	Mamakoli Senauoane	Lesotho	58.90
30	4	Tasabih Mahdi	Sudan	1:03.90
	2	Nafy Mane	Senegal	DQ	R162.7[2]

Qualification: First 4 in each semifinal (Q) advanced directly to the final.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Galefele Moroko	Botswana	51.53	Q
2	1	Mary Moraa	Kenya	51.75	Q
3	2	Favour Ofili	Nigeria	51.94	Q
4	1	Patience Okon George	Nigeria	51.96	Q
5	1	Leni Shida	Uganda	51.99	Q
6	2	Grace Obour	Ghana	52.14	Q
7	2	Beatrice Masilingi	Namibia	52.39	Q
8	2	Assia Raziki	Morocco	53.07	Q
9	1	Tjipekapora Herunga	Namibia	53.49
10	1	Nasiba Nabirye	Uganda	53.71
11	2	Eman Elbashl	Egypt	53.84
12	2	Stella Wonruku	Uganda	54.11
13	1	Linda Kageha	Kenya	54.12
14	1	Marcelle Bouele Bondo	Republic of the Congo	54.65
15	2	Amarachukwu Jecinta Obi	Nigeria	54.93
	2	Maggie Barrie	Sierra Leone	DNS