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2012  World  Top 20 Compiled by Mirko Jalava, Tilastopaja Oy. Text version here.

Women
400 m hurdles
1	52.70			Natalya Antyukh	RUS	26 Jun 81	175/64	1	OG	London	8 Aug
2	52.77			Lashinda Demus	USA	10 Mar 83	170/57	2	OG	London	8 Aug
3	53.38			Zuzana Hejnová	CZE	19 Dec 86	170/54	3	OG	London	8 Aug
4	53.49			Kaliese Spencer	JAM	6 May 87		1	Athletissima	Lausanne	23 Aug
5	53.74			Melaine Walker	JAM	1 Jan 83	165/53	2	Athletissima	Lausanne	23 Aug
6	53.77			Irina Davydova	RUS	27 May 88		1	EC	Helsinki	29 Jun
7	53.77			Perri Shakes-Drayton	GBR	21 Dec 88		1	Aviva	London	13 Jul
8	53.92			Georganne Moline	USA	6 Mar 90		5	OG	London	8 Aug
9	54.04			Vania Stambolova	BUL	28 Nov 83	175/53	1	Club Ch	Izmir	20 May
10	54.21			T'erea Brown	USA	24 Oct 89		3s1	OG	London	6 Aug
11	54.24			Denisa Rosolová	CZE	21 Aug 86	175/61	2	EC	Helsinki	29 Jun
12	54.35			Hanna Yaroshchuk	UKR	24 Nov 89		3	EC	Helsinki	29 Jun
13	54.40	NR		Joke Odumosu	NGR	27 Oct 87	168/59	1s3	OG	London	6 Aug
14	54.78			Yelena Churakova	RUS	16 Dec 86		5	EC	Helsinki	29 Jun
15	54.81			Angela Moroşanu	ROU	26 Jul 86	178/57	1	IntC	Bucureşti	8 Jun
16	54.89			Yadisleidy Pedroso	CUB	28 Jan 87		1	CAA	Brazzaville	10 Jun
17	54.96			Eilidh Child	GBR	20 Feb 87		1	AtletiCAG	Genève	2 Jun
18	54.98			Hanna Titimets	UKR	5 Mar 89		1	NC	Yalta	14 Jun
19	55.01			Tiffany Williams	USA	5 Feb 83	160/57	2	Or	Istanbul	9 Jun
20	55.18			Latosha Wallace	USA	25 Mar 85		1	GP	Belém	6 May