Die Feuerwehr Mersch zählte am 1. Januar 2018 insgesamt 64 Mitglieder, davon 29 Aktive, 7 Veterane, 12 Inaktive und 16 Jugendfeuerwehrleute.
| BECKER | Romain | |
| BERNA | Marc | |
| DAMGE | Marc | |
| DIAS AFONSO | David Miguel | |
| DOS SANTOS | David |  |
| DOS SANTOS GOMES | Filipe |  |
| DURBACH | Charel | |
| GREISCHER | Jean-Luc |  |
| GRUND | Steve |  |
| HANSEN | Félix | |
| HOFFMANN | Alain |  |
| HOFFMANN | Jo | |
| HOFFMANN | Mike | |
| HOFFMANN | Tim |  |
| HOFFMANN-SAND | Marie-Jeanne | |
| JACKOWSKI | Lukasz Daniel | |
| KOENER | Daniel |  |
| KRAUS | Marcel | |
| LEONARD | Thomas | |
| LOPES | Steven |  |
| MARTINS DOS SANTOS | Yannick |  |
| MULLER | Laurie |  |
| PEREIRA | Diane | |
| RISCH | Kim | |
| ROCHA DE SOUSA | Sergio | |
| STUEBER | Steve |  |
| WAGENER | Christian |  |
| WAGENER | Jean-Paul | |
| WANG | Guy | |
