The women's 100m backstroke events at the 2020 World Para Swimming European Open Championships were held at the Penteada Olympic Pools Complex.
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| Nora Meister | 1:21.78 | ER | ||
| Verena Schott | 1:22.75 | |||
| Yelyzaveta Mereshko | 1:24.04 | |||
| 4 | Anastasia Diodorova | 1:26.43 | ||
| 5 | Anastasiia Zavalii | 1:30.34 | ||
| 6 | Gabriele Cepaviciute | 1:32.35 | ||
| 7 | Arianna Talamona | 1:33.78 | ||
| 8 | Maria Tsakona | 1:43.58 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| Viktoriia Ishchiulova | 1:13.59 | |||
| Kateryna Denysenko | 1:19.33 | |||
| Xenia Francesca Palazzo | 1:20.73 | |||
| 4 | Mira Jeanne Maack | 1:22.77 | ||
| 5 | Mariia Pavlova | 1:24.99 | ||
| 6 | Jade Le Bris | 1:26.04 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| Daria Pikalova | 1:07.85 | |||
| Maria Delgado Nadal | 1:10.32 | |||
| Alessia Berra | 1:15.53 | |||
| 4 | Yaryna Matlo | 1:18.85 | ||
| 5 | Neele Labudda | 1:22.16 | ||
| 6 | Katarina Chuda | 1:23.98 | ||
| 7 | Aliya Rakhimbekova | 1:29.60 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Jessica-Jane Applegate | 1:10.88 | Q | |
| 2 | Elizaveta Barbatina | 1:11.69 | Q | |
| 3 | Janina Breuer | 1:13.18 | Q | |
| 4 | Olga Poteshkina | 1:16.14 | Q | |
| 5 | Eva Coronado Tejeda | 1:16.43 | Q | |
| 6 | Pernilla Lindberg | 1:17.14 | Q | |
| 7 | Janina Falk | 1:20.72 | Q | |
| 8 | Maely Chevallier | 1:23.86 | Q | |
| — | Giorgia Marchi | DQ |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| Jessica-Jane Applegate | 1:09.37 | |||
| Janina Breuer | 1:12.00 | |||
| Olga Poteshkina | 1:15.12 | |||
| 4 | Eva Coronado Tejeda | 1:15.45 | ||
| 5 | Pernilla Lindberg | 1:15.46 | ||
| 6 | Janina Falk | 1:17.13 | ||
| 7 | Maely Chevallier | 1:22.21 | ||
| — | Elizaveta Barbatina | DNS |
The men's 100 metre backstroke events at the 2020 World Para Swimming European Championships were held at the Penteada Olympic Pools Complex in Funchal, Madeira, Portugal between 16–22 May 2021.