The arrondissement of Dieppe is an arrondissement of France in the Seine-Maritime department in the Normandy région.

[2] Its population is 232,559 (2021), and its area is 3,120.1 km2 (1,204.7 sq mi).

[3] The communes of the arrondissement of Dieppe, and their INSEE codes, are:[2] The arrondissement of Dieppe was created in 1800.

[5] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Dieppe were, as of January 2015:[6]