# 2018 IAAF World U20 Championships – Women's 800 metres

The women's 800 metres at the 2018 IAAF World U20 Championships was held at Ratina Stadium on 10, 11 and 12 July.

## Records

Standing records prior to the 2018 IAAF World U20 Championships in Athletics :
| World Junior Record | Pamela Jelimo (KEN) | 1:54.01 | Zürich, Switzerland | 29 August 2008 |
| Championship Record | Elena Mirela Lavric (ROM) | 2:00.06 | Bydgoszcz, Poland | 11 July 2008 |
| World Junior Leading | Keely Small (AUS) | 2:00.81 | Gold Coast, Queensland, Australia | 12 April 2018 |

## Results
### Heats

Qualification: First 4 of each heat (Q) and the 4 fastest times (q) qualified for the semifinals.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 3 | Ayaka Kawata | Japan | 2:05.08 | Q |
| 2 | 1 | Ayano Shiomi | Japan | 2:05.13 | Q |
| 3 | 5 | Diribe Welteji | Ethiopia | 2:05.18 | Q |
| 4 | 1 | Jackline Wambui | Kenya | 2:05.27 | Q |
| 5 | 3 | Lydia Jeruto Lagat | Kenya | 2:05.63 | Q |
| 6 | 3 | Maeliss Trapeau | France | 2:05.72 | Q |
| 7 | 1 | Samantha Watson | United States | 2:06.34 | Q |
| 8 | 3 | Camille Muls | Belgium | 2:06.41 | Q |
| 9 | 1 | Jemima Russell | Australia | 2:06.84 | Q |
| 10 | 5 | Katy-Ann McDonald | Great Britain | 2:07.24 | Q |
| 11 | 5 | Eloisa Coiro | Italy | 2:07.31 | Q |
| 12 | 5 | Delia Sclabas | Switzerland | 2:07.43 | Q |
| 13 | 5 | Shaquena Foote | Jamaica | 2:07.75 | q |
| 14 | 5 | Marharyta Kachanava | Belarus | 2:07.87 | q |
| 15 | 2 | Freweyni Hailu | Ethiopia | 2:08.26 | Q |
| 16 | 2 | Carley Thomas | Australia | 2:08.57 | Q |
| 17 | 2 | Gabriela Gajanová | Slovakia | 2:08.89 | Q |
| 18 | 3 | Federica Cortesi | Italy | 2:09.27 | q |
| 19 | 5 | Jo Keane | Ireland | 2:09.59 | q |
| 20 | 1 | Jinlian Tan | China | 2:09.81 | |
| 21 | 1 | Mia Helene Mørck | Denmark | 2:09.82 | |
| 22 | 2 | Chrissani May | Jamaica | 2:09.88 | Q |
| 23 | 3 | Liza Kellerman | South Africa | 2:10.05 | |
| 24 | 1 | Klara Lukan | Slovenia | 2:10.08 | |
| 25 | 2 | Raquel Meaños | Spain | 2:10.13 | |
| 26 | 2 | Freja Wærness | Denmark | 2:10.50 | |
| 27 | 4 | Caitlyn Collier | United States | 2:11.30 | Q |
| 28 | 4 | Isabelle Boffey | Great Britain | 2:11.43 | Q |
| 29 | 4 | Milena Korbut | Poland | 2:11.52 | Q |
| 30 | 3 | Carolina Hernandez-Pita | Switzerland | 2:11.52 | |
| 31 | 4 | Majtie Kolberg | Germany | 2:11.61 | Q |
| 32 | 4 | Sanne Njaastad | Norway | 2:11.82 | |
| 33 | 4 | María Lasa | Spain | 2:12.04 | |
| 34 | 2 | Aurora Rynda | Canada | 2:12.31 | |
| 35 | 1 | Veera Perälä | Finland | 2:12.38 | |
| 36 | 3 | Haley Walker | Canada | 2:12.76 | |
| 37 | 4 | Shyamali Kumarasingha | Sri Lanka | 2:12.91 | |
| 38 | 2 | Albina Deliu | Kosovo | 2:19.84 | |
| | 5 | Linda Philip Mamun | Athlete Refugee Team | DQ | |

### Semifinals

Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Note |
| 1 | 2 | Diribe Welteji | Ethiopia | 2:01.89 | Q |
| 2 | 1 | Freweyni Hailu | Ethiopia | 2:01.96 | Q |
| 3 | 1 | Delia Sclabas | Switzerland | 2:02.12 | Q, NJR |
| 4 | 3 | Carley Thomas | Australia | 2:03.19 | Q, PB |
| 5 | 2 | Katy-Ann McDonald | Great Britain | 2:03.20 | Q, PB |
| 6 | 3 | Gabriela Gajanová | Slovakia | 2:03.36 | Q, PB |
| 7 | 3 | Ayaka Kawata | Japan | 2:03.37 | q |
| 8 | 1 | Jackline Wambui | Kenya | 2:03.44 | q, SB |
| 9 | 2 | Ayano Shiomi | Japan | 2:03.72 | |
| 10 | 3 | Caitlyn Collier | United States | 2:03.95 | |
| 11 | 1 | Samantha Watson | United States | 2:03.95 | |
| 12 | 2 | Lydia Jeruto Lagat | Kenya | 2:04.59 | |
| 13 | 2 | Jemima Russell | Australia | 2:04.81 | PB |
| 14 | 3 | Maeliss Trapeau | France | 2:05.35 | |
| 15 | 3 | Marharyta Kachanava | Belarus | 2:06.53 | |
| 16 | 3 | Milena Korbut | Poland | 2:06.60 | |
| 17 | 2 | Eloisa Coiro | Italy | 2:06.85 | SB |
| 18 | 1 | Jo Keane | Ireland | 2:06.91 | PB |
| 19 | 1 | Shaquena Foote | Jamaica | 2:08.02 | |
| 20 | 2 | Camille Muls | Belgium | 2:08.16 | |
| 21 | 1 | Federica Cortesi | Italy | 2:09.85 | |
| 22 | 2 | Majtie Kolberg | Germany | 2:10.66 | |
| 23 | 3 | Chrissani May | Jamaica | 2:10.70 | |
| 24 | 1 | Isabelle Boffey | Great Britain | 2:11.49 | |

### Final

| Rank | Lane | Name | Nationality | Time | Note |
| | 3 | Diribe Welteji | Ethiopia | 1:59.74 | CR |
| | 8 | Carley Thomas | Australia | 2:01.13 | PB |
| | 6 | Delia Sclabas | Switzerland | 2:01.29 | NJR |
| 4 | 1 | Gabriela Gajanová | Slovakia | 2:01.90 | PB |
| 5 | 4 | Freweyni Hailu | Ethiopia | 2:02.80 | |
| 6 | 5 | Ayaka Kawata | Japan | 2:03.57 | |
| 7 | 7 | Katy-Ann McDonald | Great Britain | 2:04.08 | |
| 8 | 2 | Jackline Wambui | Kenya | 2:04.61 | |