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2013 World Indoor Top 20 Compiled by Mirko Jalava, Tilastopaja Oy. Text version here.

Women
400 m
1	50.85			Perri Shakes-Drayton	GBR	21 Dec 88		1	EC	Göteborg	3 Mar
2	50.88			Natasha Hastings	USA	23 Jul 86		1	BAGP	Birmingham	16 Feb
3	50.88	AJR		Shaunae Miller	BAH	15 Apr 94		1	NCAA	Fayetteville AR	9 Mar
4	51.05			Regina George	NGR	17 Feb 91		2	NCAA	Fayetteville AR	9 Mar
5	51.27			Zuzana Hejnová	CZE	19 Dec 86	170/54	2s2	EC	Göteborg	2 Mar
6	51.27			Ashley Spencer	USA	8 Jun 93		1rB	NCAA	Fayetteville AR	9 Mar
7	51.31			Kseniya Ustalova	RUS	14 Jan 88		1	NC	Moskva	13 Feb
8	51.45			Eilidh Child	GBR	20 Feb 87		2	EC	Göteborg	3 Mar
9	51.76			Kineke Alexander	VIN	21 Feb 86		1	TAMU Inv	College Station TX	9 Feb
10	51.82			Ebonie Floyd	USA	21 Oct 83		1	TAMU Chall	College Station TX	26 Jan
11	51.98			Marie Gayot	FRA	18 Dec 89		1	NC	Aubière	17 Feb
12	52.01			Phyllis Francis	USA	4 May 92		2rB	NCAA	Fayetteville AR	9 Mar
13	52.02	NR		Indira Terrero	CUB	29 Nov 85	161/52	1		Metz	24 Feb
14	52.04	NR		Moa Hjelmer	SWE	19 Jun 90		3	EC	Göteborg	3 Mar
15	52.07			Angela Moroşanu	ROU	26 Jul 86	178/57	1h2	EC	Göteborg	1 Mar
16	52.09			Georganne Moline	USA	6 Mar 90		3rB	NCAA	Fayetteville AR	9 Mar
17	52.12			Mary Wineberg	USA	3 Jan 80	178/62	1	New Balance	New York NY	26 Jan
18	52.12			Denisa Rosolová	CZE	21 Aug 86	175/61	3s2	EC	Göteborg	2 Mar
19	52.16			Kamaria Brown	USA	21 Dec 92		2	SEC	Fayetteville AR	24 Feb
20	52.18			Patricia Hall	JAM	16 Oct 82		1	Winter	Moskva	3 Feb