# Swimming at the 2018 European Aquatics Championships – Mixed 4 × 100 metre medley relay

The Mixed 4 × 100 metre medley relay competition of the 2018 European Aquatics Championships was held on 6 August 2018.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Team | Time | Location | Date |
| World record | United States | 3:38.56 | Budapest | 26 July 2017 |
| European record | Great Britain | 3:41.56 | Budapest | 26 July 2017 |
| Championship record | Great Britain | 3:44.02 | Berlin | 19 August 2014 |
The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 6 August | Final | Great Britain | 3:40.18 | CR, ER |

## Results
### Heats

The heats were started at 10:36.
| Rank | Heat | Lane | Nation | Smimmers | Time | Notes |
| 1 | 1 | 8 | Netherlands | Maaike de Waard (1:01.08) Arno Kamminga (59.06) Joeri Verlinden (51.78) Ranomi Kromowidjojo (53.42) | 3:45.34 | Q |
| 2 | 1 | 3 | Germany | Jenny Mensing (1:00.41) Fabian Schwingenschlögl (59.84) Marius Kusch (51.69) Annika Bruhn (54.28) | 3:46.22 | Q |
| 3 | 1 | 4 | Russia | Grigoriy Tarasevich (53.22) Ilya Khomenko (59.57) Viktoriya Andreeva (59.68) Maria Kameneva (53.98) | 3:46.45 | Q |
| 4 | 2 | 1 | Great Britain | Nicholas Pyle (54.50) Adam Peaty (58.49) Charlotte Atkinson (59.90) Freya Anderson (54.55) | 3:47.44 | Q |
| 5 | 2 | 6 | Italy | Matteo Restivo (55.14 ) Arianna Castiglioni (1:06.32) Elena Di Liddo (57.76) Luca Dotto (48.51) | 3:47.73 | Q |
| 6 | 2 | 5 | Poland | Kacper Stokowski (55.21) Marcin Stolarski (1:00.40) Anna Dowgiert (59.47) Katarzyna Wasick (54.43) | 3:49.51 | Q |
| 7 | 1 | 6 | Sweden | Gustav Hökfelt (55.43) Johannes Skagius (1:00.26) Louise Hansson (57.95) Magdalena Kuras (55.94) | 3:49.58 | Q |
| 8 | 1 | 5 | Switzerland | Thierry Bollin (55.37) Yannick Käser (1:00.43) Svenja Stoffel (1:00.01) Maria Ugolkova (54.05) | 3:49.86 | Q |
| 9 | 1 | 7 | Israel | David Gamburg (55.71) Itay Goldfaden (1:02.18) Amit Ivry (58.77) Andrea Murez (54.23) | 3:50.89 | |
| 10 | 2 | 2 | Belgium | Emmanuel Vanluchene (56.32) Basten Caerts (1:00.32) Kimberly Buys (58.39) Juliette Dumont (56.19) | 3:51.22 | |
| 11 | 2 | 3 | Lithuania | Gytis Stankevičius (55.10) Kotryna Teterevkova (1:08.74) Deividas Margevičius (52.41) Rūta Meilutytė (55.60) | 3:51.85 | |
| 12 | 2 | 8 | Belarus | Mikita Tsmyh (55.14) Ilya Shymanovich (59.15) Anastasiya Kuliashova (1:00.73) Yuliya Khitraya (57.13) | 3:52.15 | |
| 13 | 2 | 7 | Estonia | Karl Johann Luht (55.88) Maria Romanjuk (1:09.51) Daniel Zaitsev (53.11) Kertu Ly Alnek (56.40) | 3:54.90 | |
| 14 | 1 | 1 | Austria | Bernhard Reitshammer (55.47) Christopher Rothbauer (1:01.76) Claudia Hufnagl (1:02.07) Lena Kreundl (55.70) | 3:55.00 | |
| 15 | 1 | 0 | Turkey | Metin Aydın (55.85) Berkay Ömer Öğretir (1:01.51) Nida Eliz Üstündağ (1:02.20) Selen Özbilen (56.11) | 3:55.67 | |
| 16 | 2 | 4 | Latvia | Ģirts Feldbergs (55.96) Daniils Bobrovs (1:01.62) Gabriela Ņikitina (1:05.45) Ieva Maļuka (56.01) | 3:59.04 | |
| 17 | 1 | 2 | Slovakia | Adam Černek (58.20) Tomáš Klobučník (1:00.82) Andrea Podmaníková (1:03.37) Laura Benková (57.34) | 3:59.73 | |
| | 2 | 0 | Hungary | Gábor Balog (54.59) Anna Sztankovics (1:08.46) Evelyn Verrasztó (1:00.41) Dominik Kozma | Disqualified | Disqualified |

### Final

The final was held at 18:22.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 6 | Great Britain | Georgia Davies (59.12) Adam Peaty (57.27) James Guy (50.96) Freya Anderson (52.83) | 3:40.18 | ER, CR |
| | 3 | Russia | Kliment Kolesnikov (52.51) Yuliya Yefimova (1:05.07) Svetlana Chimrova (57.30) Vladimir Morozov (47.83) | 3:42.71 | NR |
| | 2 | Italy | Margherita Panziera (1:00.11) Fabio Scozzoli (59.46) Elena Di Liddo (57.68) Alessandro Miressi (47.60) | 3:44.85 | NR |
| 4 | 4 | Netherlands | Kira Toussaint (1:00.33) Arno Kamminga (1:00.89) Joeri Verlinden (51.37) Ranomi Kromowidjojo (52.98) | 3:45.57 | |
| 5 | 5 | Germany | Jenny Mensing (1:00.91) Fabian Schwingenschlögl (59.65) Marius Kusch (51.41) Annika Bruhn (53.85) | 3:45.82 | |
| 6 | 7 | Poland | Alicja Tchórz (1:00.94) Marcin Stolarski (1:00.14) Michał Chudy (52.57) Katarzyna Wasick (54.07) | 3:47.72 | NR |
| 7 | 8 | Switzerland | Thierry Bollin (54.81) Yannick Käser (1:00.46) Svenja Stoffel (59.46) Maria Ugolkova (53.53) | 3:48.26 | NR |
| 8 | 1 | Sweden | Gustav Hökfelt (54.71) Johannes Skagius (1:00.40) Louise Hansson (58.01) Ida Lindborg (55.41) | 3:48.53 | NR |