| Ekaterina Efremenkova | |
| Nationality: | Russian |
| Birth Date: | 1997 12, df=yes |
| Birth Place: | Chelyabinsk, Russia |
| Height: | 1.68 m |
| Weight: | 58 kg |
| Country: |  Russia |
| Sport: | Short track speed skating |
| Event: | 500 m, 1000 m, 1500 m |
| Club: | Lidia Skoblikova Speed Skating Sports School of Olympic Reserve |
| Show-Medals: | yes |
Ekaterina Olegovna Efremenkova (Russian: Екатерина Олеговна Ефременкова; born 31 December 1997) is a Russian short track speed skater.[1] She won a bronze medal in the 3,000 meters relay at the 2016 World Short Track Speed Skating Championships.[2]
| Date | Season | Location | Rank | Event | |
|---|---|---|---|---|---|
| 14 February 2016 | 2015–16 | 1500 m | |||
| 12 February 2017 | 2016–17 | 1500 m | |||
| 1 October 2017 | 2017–18 | 3000 m relay | |||
| 19 November 2017 | 2017–18 | 3000 m relay | |||
| 3 November 2018 | 2018–19 | 1500 m | |||
| 4 November 2018 | 2018–19 | 3000 m relay | |||
| 11 November 2018 | 2018–19 | 3000 m relay | |||
| 8 December 2018 | 2018–19 | 1500 m | |||
| 3 February 2019 | 2018–19 | 3000 m relay | |||
| 10 February 2019 | 2018–19 | 2000 m mixed relay |