The arrondissement of Thionville is an arrondissement of France in the Moselle department in the Grand Est region.

It has 104 communes.

[2] Its population is 273,063 (2021), and its area is 941.5 km2 (363.5 sq mi).

[3] The communes of the arrondissement of Thionville are:[2] The arrondissement of Thionville was created in 1800 and disbanded in 1871 (ceded to Germany).

[4] The arrondissement of Thionville was restored in January 2015 by the merger of the former arrondissements of Thionville-Est and Thionville-Ouest.