# 2018 African Swimming Championships – 4 × 100 metre mixed freestyle relay

The Mixed 4 × 100 metre freestyle relay competition of the 2018 African Swimming Championships was held on 11 September 2018.

## Records

Prior to the competition, the existing world and championship records were as follows.
| | Team | Time | Location | Date |
| World record | United States | 3:27.28 | Rome | 2 August 2009 |
| African record | South Africa | 3:31.38 | Budapest | 29 July 2007 |
| Championship record | — | — | — | — |
The following new records were set during this competition.
| Date | Event | Nation | Time | Record |
| 11 September | Heat | Algeria | 3:42.43 | CR |
| 11 September | Final | Egypt | 3:36.94 | CR |

## Results
### Heats

The heats were started on 11 September at 12:15.
| Rank | Nation | Swimmers | Time | Notes |
| 1 | Algeria | Aimen Benabid (53.44) Nesrine Medjahed (59.72) Mehdi Nazim Benbara (51.64) Amel Melih (57.63) | 3:42.43 | Q CR |
| 2 | Egypt | Ali Khalafalla (52.35) Farida Osman (58.88) Samiha Mohsen (59.93) Mohamed Samy (52.77) | 3:43.93 | Q |
| 3 | Tunisia | Mohamed Aziz Ghaffari (51.78) Farah Benkhelil (59.79) Menna Kchouk (1:01.29) Mohamed Ali Chaouchi (53.45) | 3:46.31 | Q |
| 4 | South Africa | Matthew Bowers (53.14) Janie Coetzer (1:00.32) Lesley Blignaut (1:00.67) Ayrton Sweeney (53.02) | 3:47.15 | Q |
| 5 | Morocco | Samy Boutouil (53.49) Yasmeen Boutouil (1:01.07) Noura Mana (1:00.13) Yusuf Tibazi (56.05) | 3:50.74 | Q |
| 6 | Mauritius | Mathieu Marquet (52.15) Ovesh Purahoo (54.55) Camille Koenig (1:03.19) Tessa Ip Hen Cheung (1:01.74) | 3:51.63 | Q NR |
| 7 | Kenya | Swaleh Talib (54.73) Alvin Omondi (55.98) Imara-Bella Thorpe (1:01.06) Rebecca Kamau (1:02.99) | 3:54.76 | Q NR |
| 8 | Senegal | El Hadji Adama Niane (53.01) Ndeye Tabara Diagne (1:00.28) Adama Ndir (55.91) Amadou Ndiaye (1:07.66) | 3:56.86 | Q NR |
| 9 | Angola | Mario Ervedosa (57.39) Lia Lima (1:05.32) Daniel Francisco (55.07) Catarina Sousa (1:00.62) | 3:58.40 | NR |
| 10 | Mozambique | Edilson Paco (58.46) Ahllan Bique (55.71) Jannat Bique (1:06.39) Denise Mabasso (1:08.59) | 4:09.15 | |
| 11 | Uganda | Adnan Kabuye (58.66) Avice Meya (1:06.38) Selina Katumba (1:06.15) Atuhaire Ambala (58.42) | 4:09.61 | NR |

### Final

The final was started on 11 September.
| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 5 | Egypt | Ali Khalafalla (50.84) Farida Osman (56.58) Samiha Mohsen (1:00.37) Mohamed Samy (49.15) | 3:36.94 | CR NR |
| | 6 | South Africa | Jacques Van Wyk (51.08) Erin Gallagher (55.02) Alaric Basson (51.58) Hannah Kiely (59.36) | 3:37.04 | |
| | 4 | Algeria | Aimen Benabid (52.77) Nesrine Medjahed (59.48) Mehdi Nazim Benbara (51.23) Amel Melih (56.91) | 3:40.39 | NR |
| 4 | 3 | Tunisia | Mohamed Aziz Ghaffari (51.30) Farah Benkhelil (59.40) Menna Kchouk (1:00.94) Mohamed Agili (51.41) | 3:43.05 | |
| 5 | 7 | Mauritius | Mathieu Marquet (52.80) Bradley Vincent (50.38) Camille Koenig (1:01.50) Tessa Ip Hen Cheung (1:02.41) | 3:47.09 | NR |
| 6 | 2 | Morocco | Yusuf Tibazi (54.02) Yasmeen Boutouil (1:01.57) Noura Mana (1:00.19) Samy Boutouil (52.85) | 3:48.63 | NR |
| 7 | 1 | Kenya | Swaleh Talib (54.58) Alvin Omondi (56.91) Imara-Bella Thorpe (1:01.70) Rebecca Kamau (1:02.75) | 3:55.94 | |
| 8 | 8 | Senegal | El Hadji Adama Niane (53.49) Jeanne Boutbien (1:01.02) Adama Ndir (55.11) Ndeye Tabara Diagne (1:07.55) | 3:57.17 | |