2001 World Championships in Athletics – Women's 400 metres hurdles

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

Rank	Heat	Name	Nationality	Time	Notes
1	2	Yuliya Nosova	Russia	54.43	Q
2	1	Nezha Bidouane	Morocco	54.55	Q
3	1	Debbie-Ann Parris	Jamaica	54.81	Q
4	2	Tonja Buford-Bailey	United States	54.99	Q
5	3	Sandra Glover	United States	55.38	Q
6	4	Deon Hemmings	Jamaica	55.39	Q
7	3	Daimi Pernia	Cuba	55.40	Q
8	2	Ionela Tirlea	Romania	55.41	Q
9	1	Małgorzata Pskit	Poland	55.45	Q
10	1	Yvonne Harrison	Puerto Rico	55.63	q, NR
11	1	Natalya Torshina	Kazakhstan	55.69	q
12	3	Monika Niederstatter	Italy	55.83	Q, SB
13	1	Karlene Haughton	Canada	55.94	q, SB
14	2	Anna Olichwierczuk	Poland	55.98	q
15	4	Sinead Dudgeon	Great Britain	56.07	Q, SB
16	4	Brenda Taylor	United States	56.28	Q
17	2	Mame Tacko Diouf	Senegal	56.44	SB
18	4	Heike Meissner	Germany	56.79
19	3	Surita Febbraio	South Africa	56.80
20	2	Sylvanie Morandais	France	56.85
21	3	Melaine Walker	Jamaica	57.10
21	4	Andrea Blackett	Barbados	57.10
23	2	Keri Maddox	Great Britain	57.55
24	4	Noraseela Khalid	Malaysia	59.12
	4	Tetyana Tereshchuk-Antipova	Ukraine	DNS

Qualification: First 4 in each semifinal qualified directly (Q) for the final.

Rank	Heat	Name	Nationality	Time	Notes
1	1	Daimi Pernia	Cuba	53.81	Q, WL
2	1	Nezha Bidouane	Morocco	53.85	Q, SB
3	1	Debbie-Ann Parris	Jamaica	53.88	Q, PB
4	2	Yuliya Nosova	Russia	54.03	Q
5	2	Tonja Buford-Bailey	United States	54.15	Q, SB
6	2	Deon Hemmings	Jamaica	54.47	Q, SB
7	2	Ionela Tirlea	Romania	54.92	Q
8	1	Sandra Glover	United States	55.04	Q, SB
9	1	Małgorzata Pskit	Poland	55.28
10	2	Anna Olichwierczuk	Poland	55.64
11	1	Karlene Haughton	Canada	55.68	SB
12	1	Monika Niederstatter	Italy	56.37
13	1	Natalya Torshina	Kazakhstan	56.45
14	2	Brenda Taylor	United States	56.52
15	2	Yvonne Harrison	Puerto Rico	56.70
16	2	Sinead Dudgeon	Great Britain	56.92