Women's 800m Freestyle at the 2003 FINA World Aquatics Championships
Venue	Palau Sant Jordi
Dates	25 July (prelims); 26 July (final)
Winning time	8 minutes 23.66 seconds
Medalists
Hannah Stockbauer    Germany   Diana Munz    United States   Rebecca Cooke    Great Britain
← 2001 2005 →

The Women's 800m Freestyle event at the 10th FINA World Aquatics Championships swam on 25–26 July 2003 in Barcelona, Spain. Preliminary^[1] heats swam during the morning session on July 25, with the top-8 finishers advancing to swim the race again in the Final^[2] during the evening session on July 26.

Prior to the event, the World (WR) and Championship (CR) records were:

• WR: 8:16.22 swum by Janet Evans (USA) on August 20, 1989 in Tokyo, Japan
• CR: 8:24.05 swum by Janet Evans (USA) on January 12, 1991 in Perth, Australia

Place	Swimmer	Nation	Time	Notes
1	Hannah Stockbauer	Germany	8:23.66	CR
2	Diana Munz	USA	8:24.19
3	Rebecca Cooke	Great Britain	8:28.45
4	Brittany Reimer	Canada	8:28.73
5	Jana Henke	Germany	8:30.12
6	Éva Risztov	Hungary	8:35.70
7	Regina Sytch	Russia	8:39.96
8	Chen Hua	China	8:46.78

Rank	Heat+Lane	Swimmer	Nation	Time	Notes
1	H4 L5	Diana Munz	United States	8:32.44	q
2	H4 L4	Chen Hua	China	8:32.72	q
3	H4 L2	Regina Sytch	Russia	8:32.86	q
4	H4 L6	Rebecca Cooke	Great Britain	8:32.95	q
5	H3 L4	Hannah Stockbauer	Germany	8:32.98	q
6	H5 L5	Éva Risztov	Hungary	8:35.40	q
7	H3 L6	Brittany Reimer	Canada	8:35.76	q
8	H5 L4	Jana Henke	Germany	8:36.07	q
9	H5 L2	Simona Păduraru	Romania	8:36.29
10	H3 L2	Erika Villaécija	Spain	8:36.99
11	H5 L3	Hayley Peirsol	United States	8:38.78
12	H3 L5	Sashiko Yamada	Japan	8:40.16
13	H4 L1	Ai Shibata	Japan	8:40.70
14	H5 L6	Olga Beresneva	Ukraine	8:41.23
15	H3 L3	Amanda Pascoe	Australia	8:42.27
16	H5 L1	Linda Mackenzie	Australia	8:43.08
17	H3 L7	Melissa Caballero	Spain	8:43.16
18	H2 L5	Taryn Lencoe	Canada	8:44.20
19	H4 L3	Laure Manaudou	France	8:44.75
20	H4 L8	Réka Nagy	Hungary	8:45.13
21	H3 L1	Anja Čarman	Slovenia	8:45.23
22	H3 L8	Chantal Strasser	Switzerland	8:45.74
23	H5 L8	Jana Pechanová	Czech Republic	8:46.76
24	H2 L3	Maria Bulakhova	Russia	8:50.99
25	H2 L7	Kristel Köbrich	Chile	8:52.02
26	H2 L4	Nayara Ribeiro	Brazil	8:52.22
27	H5 L7	Marianna Lymperta	Greece	8:54.35
28	H2 L6	Hanna Miluska	Switzerland	8:57.20
29	H4 L7	Zhang Yan	China	8:58.11
30	H2 L2	Marta Ferreira	Portugal	8:58.41
31	H2 L1	Golda Marcus	El Salvador	9:15.28
32	H1 L3	Shrone Austin	Seychelles	9:27.06
33	H2 L8	Magdalena Sutanto	Indonesia	9:32.41
34	H1 L5	Johana Rodriguez	Costa Rica	9:35.12
35	H1 L4	Roberta Callus	Malta	9:49.65
-	-	Liana Ramerison Rabenja	Madagascar	DNS
-	-	Tojohanitra Andriamanjatoarimanana	Madagascar	DNS
-	-	Corise Nyenimigabo	Burundi	DNS