The arrondissement of Saint-Laurent-du-Maroni is an arrondissement of France in French Guiana department in French Guiana region. It has eight communes. Its population is 97,568 (2021), and its area is .
The communes of the arrondissement of Saint-Laurent-du-Maroni, and their INSEE codes, are:
The arrondissement of Saint-Laurent-du-Maroni was established in 1969.
Before 2015, the arrondissements of French Guiana were subdivided into cantons. The cantons of the arrondissement of Saint-Laurent-du-Maroni were, as of January 2015:
In May 2025, the French Government announced plans to build a new maximum security prison in the region.