The Women's 400 metres hurdles event at the 2011 European Athletics U23 Championships was held in Ostrava, Czech Republic, at Městský stadion on 14 and 16 July.
| Gold | Anna Yaroshchuk | |
| Silver | Hanna Titimets | |
| Bronze | Meghan Beesley |
16 July 2011 / 16:00
| Rank | Name | Nationality | Lane | Reaction Time | Time | Notes | |||
|---|---|---|---|---|---|---|---|---|---|
| align=left | align=left | | 5 | 0.213 | 54.77 | PB | |||
| align=left | align=left | | 6 | 0.231 | 54.91 | ||||
| align=left | align=left | 3 | 0.177 | 55.69 | PB | ||||
| 4 | align=left | align=left | 4 | 0.277 | 55.81 | NR | |||
| 5 | align=left | align=left |  | 8 | 0.285 | 56.62 | PB | ||
| 6 | align=left | align=left | 7 | 0.218 | 57.05 | SB | |||
| 7 | align=left | align=left | 2 | 0.186 | 57.43 | ||||
| 8 | align=left | align=left |  | 1 | 0.209 | 57.99 | SB |
Qualified: First 2 in each heat (Q) and 2 best performers (q) advance to the Final
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 56.22 | Q | ||
| 2 | align=left | align=left | 56.70 | Q PB | |||
| 3 | align=left | align=left | | 57.20 | q SB | ||
| 4 | align=left | align=left | 57.38 | Q | |||
| 5 | align=left | align=left | | 57.74 | Q | ||
| 6 | align=left | align=left | 57.95 | q | |||
| 7 | align=left | align=left | | 58.01 | Q | ||
| 8 | align=left | align=left |  | 58.40 | |||
| 9 | align=left | align=left |  | 58.65 | SB | ||
| 10 | align=left | align=left | 58.66 | ||||
| 11 | align=left | align=left | 58.72 | Q | |||
| 12 | align=left | align=left |  | 59.51 | |||
| 13 | align=left | align=left |  | 1:00.15 | |||
| 14 | align=left | align=left |  | 1:00.71 | |||
| 15 | align=left | align=left |  | 1:00.98 | |||
| 16 | align=left | align=left | | 1:01.24 | |||
| 17 | align=left | align=left | 1:01.45 | ||||
| 18 | align=left | align=left | | 1:03.46 |
14 July 2011 / 11:30
| Rank | Name | Nationality | Lane | Reaction Time | Time | Notes | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 4 | 0.281 | 56.22 | Q | ||
| 2 | align=left | align=left | 5 | 0.325 | 56.70 | Q PB | |||
| 3 | align=left | align=left | | 3 | 0.234 | 57.20 | q SB | ||
| 4 | align=left | align=left | 6 | 0.168 | 57.95 | q | |||
| 5 | align=left | align=left | | 2 | 0.202 | 58.65 | SB | ||
| 6 | align=left | align=left | | 7 | 0.219 | 1:00.15 |
14 July 2011 / 11:37
| Rank | Name | Nationality | Lane | Reaction Time | Time | Notes | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | 6 | 0.201 | 57.38 | Q | |||
| 2 | align=left | align=left | | 5 | 0.265 | 58.01 | Q | ||
| 3 | align=left | align=left | | 4 | 0.325 | 58.40 | |||
| 4 | align=left | align=left | 3 | 0.184 | 58.66 | ||||
| 5 | align=left | align=left | | 7 | 0.251 | 59.51 | |||
| 6 | align=left | align=left | | 2 | 0.208 | 1:00.71 |
14 July 2011 / 11:44
| Rank | Name | Nationality | Lane | Reaction Time | Time | Notes | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 3 | 0.221 | 57.74 | Q | ||
| 2 | align=left | align=left | 6 | 0.236 | 58.72 | Q | |||
| 3 | align=left | align=left | | 2 | 0.256 | 1:00.98 | |||
| 4 | align=left | align=left | | 4 | 0.204 | 1:01.24 | |||
| 5 | align=left | align=left | 5 | 0.198 | 1:01.45 | ||||
| 6 | align=left | align=left | | 7 | 0.236 | 1:03.46 |
According to an unofficial count, 18 athletes from 14 countries participated in the event.