| Event: | Women's 4 x 100 metres relay |
| Competition: | European Athletics Championships |
The women's 4 x 100 metres relay at the 1966 European Athletics Championships was held in Budapest, Hungary, at Népstadion on 3 and 4 September 1966.
| Gold | Elżbieta Bednarek Danuta Straszyńska Irena Kirszenstein Ewa Kłobukowska  | |
| Silver | Renate Meyer Hannelore Trabert Karin Frisch Jutta Stöck | |
| Bronze | Vera Popkova Valentyna Bolshova Lyudmila Samotyosova Renāte Lāce |
4 September
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| align=left | | 44.49 | CR | |||
| align=left | 44.60 | NR | ||||
| align=left | 44.70 | |||||
| 4 | align=left |  | 45.1 | |||
| 5 | align=left | 45.3 | ||||
| 6 | align=left |  | 45.4 | |||
| 7 | align=left | 45.6 | ||||
| 8 | align=left |  | 45.7 | NR |
3 September
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| 1 | align=left | | 44.7 | Q | ||
| 2 | align=left | 45.3 | Q | |||
| 3 | align=left | | 45.3 | Q | ||
| 4 | align=left | | 45.6 | Q | ||
| 5 | align=left |  | 45.9 | NR |
| Rank | Nation | Competitors | Time | Notes | ||
|---|---|---|---|---|---|---|
| 1 | align=left | 44.9 | Q | |||
| 2 | align=left | 45.0 | Q | |||
| 3 | align=left | | 45.8 | NR Q | ||
| 4 | align=left | 45.9 | Q | |||
| 5 | align=left | 46.0 |
According to an unofficial count, 40 athletes from 10 countries participated in the event.
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