10th IAAF World Indoor Championships, 2004 Budapest, Hungary
Men 800 meter
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Osmar Barbosa dos Santos | BRA | 1:47.67 | Q |
| 2 | 3 | Joeri Jansen | BEL | 1:48.10 | Q |
| 3 | 5 | Michael Stember | USA | 1:48.66 | q |
| 4 | 6 | Juan de Dios Jurado | ESP | 1:48.70 | q |
| 5 | 2 | Roman Hanzel | SVK | 1:51.54 | |
| 6 | 1 | Kondwani Chiwina | MAW | 1:54.49 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Antonio Manuel Reina | ESP | 1:49.72 | Q |
| 2 | 3 | Mbulaeni Mulaudzi | RSA | 1:49.83 | Q |
| 3 | 4 | Dmitriy Bogdanov | RUS | 1:50.21 | |
| 4 | 2 | Rizak Dirshe | SWE | 1:50.89 | |
| 5 | 6 | Paskar Owor | UGA | 1:51.41 | |
| 6 | 1 | Abubaker El Gatroni | LBA | 1:52.64 |
Heat 3
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 3 | Joseph Mutua | KEN | 1:47.86 | Q |
| 2 | 2 | Arnoud Okken | NED | 1:47.88 | Q |
| 3 | 5 | Amine Laalou | MAR | 1:48.03 | q |
| 4 | 4 | Derrick Peterson | USA | 1:50.05 | |
| 5 | 1 | Sadjad Moradi | IRI | 1:50.06 | |
| 6 | Ismail Ahmed Ismail | SUD | DNF |
Heat 4
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Rashid Ramzi | BRN | 1:48.25 | Q |
| 2 | 4 | Bram Som | NED | 1:48.55 | Q |
| 3 | 1 | Fabiano Peçanha | BRA | 1:49.98 | q |
| 4 | 2 | David Fiegen | LUX | 1:50.02 | |
| 5 | 6 | Mohammad K Al-Azemi | KUW | 1:51.80 | |
| 3 | Samwel Mwera | TAN | DQ |
Heat 5
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 6 | Jean-Patrick Nduwimana | BDI | 1:47.71 | Q |
| 2 | 2 | Tom Omey | BEL | 1:48.92 | Q |
| 3 | 5 | Nicolas Aïssat | FRA | 1:50.65 | |
| 4 | 1 | Abdal Salam Aldabaji | PLE | 1:53.48 | |
| 3 | Berhanu Alemu | ETH | DQ | ||
| 4 | Gary Reed | CAN | DNF |
Heat 6
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Florent Lacasse | FRA | 1:48.01 | Q |
| 2 | 2 | Mouhssin Chehibi | MAR | 1:48.44 | Q |
| 3 | 3 | William Yiampoy | KEN | 1:48.49 | q |
| 4 | 5 | Youssef Saad Kamel | BRN | 1:48.55 | q |
| 5 | 1 | Avetik Arakelian | ARM | 1:53.44 | |
| 6 | 6 | Nazar Begliyev | TKM | 1:54.72 |
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Osmar Barbosa dos Santos | BRA | 1:46.91 | Q |
| 2 | 4 | William Yiampoy | KEN | 1:47.02 | Q |
| 3 | 1 | Youssef Saad Kamel | BRN | 1:47.16 | |
| 4 | 3 | Antonio Manuel Reina | ESP | 1:47.33 | |
| 5 | 6 | Mouhssin Chehibi | MAR | 1:47.45 | |
| 6 | 2 | Michael Stember | USA | 1:48.68 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Joseph Mutua | KEN | 1:47.07 | Q |
| 2 | 2 | Rashid Ramzi | BRN | 1:47.28 | Q |
| 3 | 5 | Florent Lacasse | FRA | 1:47.28 | |
| 4 | 6 | Arnoud Okken | NED | 1:47.84 | |
| 5 | 3 | Joeri Jansen | BEL | 1:48.61 | |
| 6 | 1 | Fabiano Peçanha | BRA | 1:51.59 |
Heat 3
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Mbulaeni Mulaudzi | RSA | 1:49.96 | Q |
| 2 | 3 | Amine Laalou | MAR | 1:50.07 | Q |
| 3 | 2 | Juan de Dios Jurado | ESP | 1:50.99 | |
| 4 | 1 | Tom Omey | BEL | 1:51.15 | |
| 5 | 6 | Jean-Patrick Nduwimana | BDI | 1:52.20 | |
| 5 | Bram Som | NED | DNF |
| Pos | Lane | Athlete | NOC | Mark |
| 1 | 4 | Mbulaeni Mulaudzi | RSA | 1:45.71 |
| 2 | 2 | Rashid Ramzi | BRN | 1:46.15 |
| 3 | 5 | Osmar Barbosa dos Santos | BRA | 1:46.26 |
| 4 | 1 | Amine Laalou | MAR | 1:46.57 |
| 5 | 6 | William Yiampoy | KEN | 1:46.88 |
| 6 | 3 | Joseph Mutua | KEN | 1:47.86 |
Women 800 meter
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Jennifer Toomey | USA | 2:04.84 | Q |
| 2 | 3 | Tatyana Andrianova | RUS | 2:05.04 | Q |
| 3 | 2 | Agnes Samaria | NAM | 2:05.05 | |
| 4 | 5 | Heather Hennigar | CAN | 2:06.68 | |
| 5 | 1 | Sheena Gooding | BAR | 2:06.97 | |
| 6 | 6 | Lwiza Msyani John | TAN | 2:06.97 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Jolanda Ceplak | SLO | 2:01.48 | Q |
| 2 | 5 | Sandra Stals | BEL | 2:01.88 | Q |
| 3 | 3 | Tetyana Petlyuk | UKR | 2:01.90 | q |
| 4 | 2 | Aimee Teteris | CAN | 2:03.75 | q |
| 5 | 6 | Mary Jayne Harrelson | USA | 2:05.16 | |
| 6 | 1 | Marlyse Nsourou | GAB | 2:21.57 |
Heat 3
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 3 | Mayte Martínez | ESP | 2:02.78 | Q |
| 2 | 5 | Seltana Aït Hammou | MAR | 2:02.83 | Q |
| 3 | 4 | Meskerem Legesse | ETH | 2:05.83 | |
| 4 | 6 | Michelle Ballentine | JAM | 2:05.94 | |
| 5 | 2 | Sandra Teixeira | POR | 2:06.74 | |
| 6 | 1 | Noelly Mankatu Bibiche | COD | 2:07.62 |
Heat 4
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Olga Raspopova | RUS | 2:03.67 | Q |
| 2 | 3 | Joanne Fenn | GBR | 2:04.01 | Q |
| 3 | 1 | Marian Burnett | GUY | 2:04.48 | |
| 4 | 2 | Esther Desviat | ESP | 2:05.66 | |
| 5 | 5 | Lotte Visschers | NED | 2:06.49 | |
| 6 | 6 | Sloan Siegrist | GUM | 2:22.72 |
Heat 5
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Maria de Lurdes Mutola | MOZ | 1:57.72 | Q |
| 2 | 6 | Amina Aït Hammou | MAR | 2:04.30 | Q |
| 3 | 2 | Monika Gradzki | GER | 2:04.68 | |
| 4 | 3 | Liliana Popescu | ROM | 2:04.75 | |
| 5 | 5 | Christiane Ritz dos Santos | BRA | 2:07.77 |
Heat 1
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 5 | Jolanda Ceplak | SLO | 1:59.26 | Q |
| 2 | 2 | Tatyana Andrianova | RUS | 1:59.96 | Q |
| 3 | 4 | Joanne Fenn | GBR | 2:00.79 | Q |
| 4 | 3 | Mayte Martínez | ESP | 2:01.06 | |
| 5 | 6 | Seltana Aït Hammou | MAR | 2:02.33 | |
| 6 | 1 | Aimee Teteris | CAN | 2:05.29 |
Heat 2
| Pos | Lane | Athlete | NOC | Mark | |
| 1 | 4 | Maria de Lurdes Mutola | MOZ | 2:03.19 | Q |
| 2 | 3 | Jennifer Toomey | USA | 2:03.40 | Q |
| 3 | 5 | Olga Raspopova | RUS | 2:03.71 | Q |
| 4 | 6 | Tetyana Petlyuk | UKR | 2:05.10 | |
| 5 | 2 | Sandra Stals | BEL | 2:05.12 | |
| 6 | 1 | Amina Aït Hammou | MAR | 2:06.17 |
| Pos | Lane | Athlete | NOC | Mark |
| 1 | 5 | Maria de Lurdes Mutola | MOZ | 1:58.50 |
| 2 | 4 | Jolanda Ceplak | SLO | 1:58.72 |
| 3 | 1 | Joanne Fenn | GBR | 1:59.50 |
| 4 | 6 | Jennifer Toomey | USA | 1:59.64 |
| 5 | 3 | Tatyana Andrianova | RUS | 1:59.71 |
| 6 | 2 | Olga Raspopova | RUS | 2:00.56 |
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