Athletics at the 1999 All-Africa Games – Men's 100 metres

Qualification: First 3 of each heat (Q) and the next 6 fastest (q) qualified for the semifinals.

Rank	Heat	Name	Nationality	Time	Notes
1	4	Deji Aliu	Nigeria	10.18	Q
2	6	Mathew Quinn	South Africa	10.22	Q
3	5	Innocent Asonze	Nigeria	10.27	Q
4	1	Frankie Fredericks	Namibia	10.32	Q
4	2	Serge Bengono	Cameroon	10.32	Q
4	3	Francis Obikwelu	Nigeria	10.32	Q
4	4	Ahmed Douhou	Ivory Coast	10.32	Q
8	2	Leonard Myles-Mills	Ghana	10.34	Q
9	2	Ibrahim Meité	Ivory Coast	10.34	Q
10	6	Benedictus Botha	Namibia	10.35	Q
11	6	Stéphane Buckland	Mauritius	10.37	Q
12	3	Benjamin Sirimou	Cameroon	10.38	Q
13	5	Sherwin Vries	Namibia	10.39	Q
14	3	Lee Roy Newton	South Africa	10.42	Q
15	2	Hadhari Djaffar	Comoros	10.46	q
16	3	Yves Sonan	Ivory Coast	10.47	q
17	1	Pascal Dangbo	Benin	10.51	Q
18	4	Bradley Agnew	South Africa	10.54	Q
19	4	Jean-Francis Ngapout	Cameroon	10.56	q
20	1	Nicholas Hogan	Mauritius	10.57	Q
21	4	Amarildo Almeida	Guinea-Bissau	10.59	q
22	1	Patrick Mocci-Raoumbé	Gabon	10.61	q
23	3	Themba Ncube	Zimbabwe	10.64
23	6	Moumi Sébergué	Chad	10.64	q
25	2	Ezra Sambu	Kenya	10.65
25	6	Souhalia Alamou	Benin	10.65
27	2	Roger Angono	Republic of the Congo	10.66
28	6	Idrissa Sanou	Burkina Faso	10.67
29	5	Fernando Ariete	Guinea-Bissau	10.74	Q
30	3	Barnabé Jolicoeur	Mauritius	10.76
31	5	Stanley Towett	Kenya	10.78
32	1	Molise Rammita	Lesotho	10.81
33	6	Florent Nedingam	Chad	10.91
34	5	David Mbyembita	Gabon	10.92
35	4	Yvan Doboze	Gabon	10.93
36	2	Berhe Tesfagiorgis	Eritrea	11.55
	5	Arcadius Fanou	Benin	DQ
	1	Joseph Kojo	Uganda	DNS
	1	Alpha Kamara	Liberia	DNS
	3	Kouami Ayassou	Togo	DNS
	4	Faissoil Ben	Comoros	DNS
	5	Téko Folligan	Togo	DNS
	5	Franus Keita	Sierra Leone	DNS
	6	Thomas Sanda	Sierra Leone	DNS

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

Rank	Heat	Name	Nationality	Time	Notes
1	1	Deji Aliu	Nigeria	10.11	Q
2	3	Leonard Myles-Mills	Ghana	10.18	Q
3	2	Francis Obikwelu	Nigeria	10.21	Q
4	2	Mathew Quinn	South Africa	10.24	Q
5	2	Serge Bengono	Cameroon	10.25	q
5	3	Innocent Asonze	Nigeria	10.25	Q
7	1	Frankie Fredericks	Namibia	10.27	Q
8	2	Stéphane Buckland	Mauritius	10.34	q
9	3	Ibrahim Meité	Ivory Coast	10.36
10	1	Ahmed Douhou	Ivory Coast	10.38
10	2	Sherwin Vries	Namibia	10.38
12	1	Benjamin Sirimou	Cameroon	10.41
13	1	Hadhari Djaffar	Comoros	10.45
14	1	Lee Roy Newton	South Africa	10.48
15	2	Yves Sonan	Ivory Coast	10.56
15	3	Benedictus Botha	Namibia	10.56
17	2	Amarildo Almeida	Guinea-Bissau	10.59
18	3	Pascal Dangbo	Benin	10.62
19	3	Bradley Agnew	South Africa	10.65
20	2	Patrick Mocci-Raoumbé	Gabon	10.66
21	3	Nicholas Hogan	Mauritius	10.69
22	3	Jean-Francis Ngapout	Cameroon	10.70
23	1	Moumi Sébergué	Chad	10.71
24	1	Fernando Ariete	Guinea-Bissau	10.85

Wind: 0.0 m/s

Rank	Name	Nationality	Time	Notes
	Leonard Myles-Mills	Ghana	9.99	GR
	Francis Obikwelu	Nigeria	10.01
	Frankie Fredericks	Namibia	10.10
4	Deji Aliu	Nigeria	10.11
5	Innocent Asonze	Nigeria	10.19
6	Serge Bengono	Cameroon	10.28
7	Mathew Quinn	South Africa	10.31
8	Stéphane Buckland	Mauritius	11.17