Swimming at the 2018 Mediterranean Games – Men's 100 metre freestyle
The men's 100 metre freestyle competition at the 2018 Mediterranean Games was held on 24 June 2018 at the Campclar Aquatic Center.
Records
Prior to this competition, the existing world and Mediterranean Games records were as follows:| World record | 46.91 | Rome, Italy | 30 July 2009 | |
| Mediterranean Games record | 47.83 | Pescara, Italy | 29 June 2009 |
Results
Heats
The heats were held at 09:48.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 4 | Alessandro Miressi | 49.01 | Q | |
| 2 | 3 | 5 | Oussama Sahnoune | 49.03 | Q | |
| 3 | 2 | 5 | Ali Khalafalla | 49.10 | Q, NR | |
| 4 | 2 | 4 | Velimir Stjepanović | 49.40 | Q | |
| 5 | 1 | 4 | Luca Dotto | 49.77 | Q | |
| 6 | 1 | 3 | Moritz Berg | 49.84 | Q | |
| 7 | 3 | 3 | Andrej Barna | 49.96 | Q | |
| 8 | 2 | 6 | Oskitz Aguilar | 50.18 | Q | |
| 9 | 1 | 6 | Kemal Arda Gürdal | 50.30 | ||
| 10 | 2 | 2 | Nikola Bjelajac | 50.47 | ||
| 11 | 3 | 2 | Yalım Acımış | 50.71 | ||
| 12 | 3 | 6 | Fotios Koliopoulos | 51.26 | ||
| 13 | 1 | 2 | Georgios Spanoudakis | 51.31 | ||
| 14 | 2 | 3 | Jonathan Atsu | 51.37 | ||
| 15 | 3 | 7 | Omar Eltonbary | 51.92 | ||
| 16 | 1 | 5 | Miguel Nascimento | 52.16 | ||
| 17 | 3 | 1 | Marko Kovačić | 52.63 | ||
| 18 | 2 | 8 | Souhail Hamouchane | 52.84 | ||
| 19 | 2 | 7 | Omiros Zagkas | 52.99 | ||
| 20 | 1 | 7 | Sebastian Konnaris | 53.12 | ||
| 21 | 3 | 8 | Dion Kadriu | 56.49 | ||
| 22 | 1 | 1 | Dren Ukimeraj | 56.58 | ||
| 2 | 1 | Audai Hassouna |
Final
The final was held at 17:42.| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Oussama Sahnoune | 48.00 | NR | ||
| 4 | Alessandro Miressi | 48.56 | |||
| 2 | Luca Dotto | 49.20 | |||
| 4 | 6 | Velimir Stjepanović | 49.47 | ||
| 5 | 3 | Ali Khalafalla | 49.66 | ||
| 6 | 1 | Andrej Barna | 49.69 | ||
| 7 | 7 | Moritz Berg | 49.79 | ||
| 8 | 8 | Oskitz Aguilar | 50.21 |