Athletics at the 1999 All-Africa Games
Track events
100 m		men		women
200 m		men		women
400 m		men		women
800 m		men		women
1500 m		men		women
5000 m		men		women
10,000 m		men		women
100 m hurdles				women
110 m hurdles		men
400 m hurdles		men		women
3000 m steeplechase		men
4×100 m relay		men		women
4×400 m relay		men		women
Road events
Marathon		men		women
10 km walk				women
20 km walk		men
Field events
High jump		men		women
Pole vault		men		women
Long jump		men		women
Triple jump		men		women
Shot put		men		women
Discus throw		men		women
Hammer throw		men		women
Javelin throw		men		women
Combined events
Heptathlon				women
Decathlon		men

The women's 400 metres event at the 1999 All-Africa Games was held 15–16 September 1999 at the Johannesburg Stadium.^[1]

Gold	Silver	Bronze
Falilat Ogunkoya  Nigeria	Olabisi Afolabi  Nigeria	Amy Mbacké Thiam  Senegal

Qualification: First 3 of each heat (Q) and the next 2 fastest (q) qualified for the final.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Olabisi Afolabi	Nigeria	50.91	Q
2	1	Falilat Ogunkoya	Nigeria	50.91	Q
3	2	Charity Opara	Nigeria	51.36	Q
4	2	Amy Mbacké Thiam	Senegal	51.44	Q
5	2	Claudine Komgang	Cameroon	51.58	Q
6	1	Mireille Nguimgo	Cameroon	52.06	Q
7	2	Kaltouma Nadjina	Chad	52.11	q
8	1	Heide Seyerling	South Africa	52.95	q
9	1	Veronica Bawuah	Ghana	54.41
10	1	Mary Apio	Uganda	54.66
11	1	Chitra Mooloo	Mauritius	54.50
12	2	Leanie van der Walt	South Africa	55.03
13	2	Carol Mokola	Zambia	58.50
14	2	Donata Mutegwamaso	Rwanda	1:00.08
15	1	Brigitte Nganaye	Central African Republic	1:04.45

Rank	Name	Nationality	Time	Notes
	Falilat Ogunkoya	Nigeria	50.02
	Olabisi Afolabi	Nigeria	50.34
	Amy Mbacké Thiam	Senegal	50.95
4	Claudine Komgang	Cameroon	51.21
5	Charity Opara	Nigeria	51.29
6	Mireille Nguimgo	Cameroon	52.06
7	Heide Seyerling	South Africa	52.27
8	Kaltouma Nadjina	Chad	52.47